CVE-2025-30090: Squirrelmail

High severity, CVSS 7.2. EPSS: 0.3% chance of exploitation in the next 30 days.

mime.php in SquirrelMail through 1.4.23-svn-20250401 and 1.5.x through 1.5.2-svn-20250401 allows XSS via e-mail headers, because JavaScript payloads are mishandled after $encoded has been set to true.

Affected products

• Squirrelmail Squirrelmail: up to and including 1.4.23-svn-20250401; from 1.5, up to and including 1.5.2-svn-20250401

Published 2025-04-02. Last modified 2026-06-17.