CVE-2010-4554: Squirrelmail

Medium severity, CVSS 4.3. EPSS: 1.8% chance of exploitation in the next 30 days.

functions/page_header.php in SquirrelMail 1.4.21 and earlier does not prevent page rendering inside a frame in a third-party HTML document, which makes it easier for remote attackers to conduct clickjacking attacks via a crafted web site.

Affected products

• Squirrelmail Squirrelmail: up to and including 1.4.21; version 0.1 only; version 0.1.1 only; version 0.1.2 only; version 0.2 only; version 0.2.1 only; …

Published 2011-07-14. Last modified 2026-06-16.