s9y/serendipity Security Advisories for 2.1.x-dev (2)
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[HIGH] Serendipity has a Host Header Injection allows SMTP header injection via unvalidated HTTP_HOST in Message-ID email header
PKSA-fdbd-416g-v2zm CVE-2026-39971 GHSA-458g-q4fh-mj6r
Affected version: <2.6.0
Reported by:
GitHub -
[MEDIUM] Serendipity has a Host Header Injection allows authentication cookie scoping to attacker-controlled domain in functions_config.inc.php
PKSA-vfgc-2rdq-w256 CVE-2026-39963 GHSA-4m6c-649p-f6gf
Affected version: <2.6.0
Reported by:
GitHub