[ CVE-2026-100523 · Published 26 Sep 2026 ]
Vulnerability in Cotonti
CVSS 6.1
EPSS <1%No fix listed yet
[ Description ]Official description
Cotonti through 1.0.0 contains an open redirect vulnerability in message.php that base64-decodes the redirect parameter without domain validation. Unauthenticated attackers can craft malicious links with encoded external URLs to redirect users to arbitrary sites via meta refresh tags for phishing attacks.
[ Fixes ]Fixes and patches
No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.