CVE-2026-100522

Medium

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.

SeverityMedium

CVSS6.1

Exploit probability—

Product

Cotonti

PublishedSep 26, 2026

First seenSep 26, 2026

Weakness typeCWE-79Cross-site scripting (XSS)

How to fix

Patches

github.com/Cotonti/Cotonti/pull/1908

Affected products

Product	Affected versions	Fixed in
Cotonti Cotonti	v ≤ 1.0.0	—

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