CVE-2026-100522: Cotonti

Medium severity, CVSS 6.1. EPSS: 0.2% chance of exploitation in the next 30 days.

Cotonti through 1.0.0 contains a reflected cross-site scripting vulnerability in message.php where the lng parameter is not properly escaped before output in the confirmation dialog. Unauthenticated attackers can craft malicious links with script payloads in the lng parameter to execute arbitrary JavaScript in victim browser sessions.

Affected products

• Cotonti Cotonti: up to and including 1.0.0

Published 2026-09-26. Last modified 2026-09-28.