CVE-2008-4304: Phpcollab

High severity, CVSS 10.0. EPSS: 3% chance of exploitation in the next 30 days.

general/login.php in phpCollab 2.5 rc3 and earlier allows remote attackers to execute arbitrary commands via shell metacharacters in unspecified input related to the SSL_CLIENT_CERT environment variable. NOTE: in some environments, SSL_CLIENT_CERT always has a base64-encoded string value, which may impose constraints on injection for typical shells.

Affected products

• Phpcollab Phpcollab: up to and including 2.5; version 2.2 only; version 2.3 only; version 2.4 only; version 2.5 only

Published 2008-12-23. Last modified 2026-06-16.