Expn — PoC Archivehttps://poc.intelseclab.com/tags/expn/Latest proof-of-concept entries.Hugoen-usFri, 03 Jul 2026 00:00:00 +0000curl SMTP EXPN Recipient CRLF Command Injectionhttps://poc.intelseclab.com/pocs/network/2026-07-03_curl-smtp-expn-crlf-injection/Fri, 03 Jul 2026 00:00:00 +0000https://poc.intelseclab.com/pocs/network/2026-07-03_curl-smtp-expn-crlf-injection/Medium severity — network · None assigned as of 2026-07-03. Status: PoC. Affects: curl / libcurl (SMTP support). Tags: curl, smtp, crlf-injection, command-injection, expn, vrfy, protocol-injection, libcurl.networkMediumcurlsmtpcrlf-injectioncommand-injectionexpnvrfyprotocol-injectionlibcurl