CVE-2026-39971

CVE-2026-39971 affects Serendipity (PHP weblog). In versions 2.6-beta2 and earlier, include/functions.inc.php embeds the HTTP_HOST value into the SMTP Message-ID header without validation, and serendipity_isResponseClean() is not applied to HTTP_HOST before embedding. An attacker who can control ...

EUVD-2026-22811

Serendipity has a Host Header Injection allows SMTP header injection via unvalidated HTTPHOST in Message-ID email header...

PT-2026-32967

Summary Serendipity inserts $ SERVER'HTTP HOST' directly into the Message-ID SMTP header without any validation beyond CRLF stripping. An attacker who can control the Host header during an email-triggering action can inject arbitrary SMTP headers into outgoing emails, enabling spam relay, BCC...

Rspamd Cross-Site Scripting Vulnerability

Rspamd is a fast spam filtering system. The system evaluates and filters spam through regular expressions, statistical analysis and blacklists. A cross-site scripting vulnerability exists in the interface/js/app/history.js file of the WebUI in versions of Rspamd prior to 1.6.3. A remote attacker...