Is CVE-2026-100522 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-100522?

CVE-2026-100522 has a CVSS v3 severity of MEDIUM (6.1).

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CVE-2026-100522

Description

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.