CVE-2009-1803: FreePBX

Medium severity, CVSS 5.0. EPSS: 1.2% chance of exploitation in the next 30 days.

FreePBX 2.5.1, and other 2.4.x, 2.5.x, and pre-release 2.6.x versions, generates different error messages for a failed login attempt depending on whether the user account exists, which allows remote attackers to enumerate valid usernames.

Affected products

• FreePBX FreePBX: version 2.4 only; version 2.4.0_beta1 only; version 2.4.0_beta2 only; version 2.4.1 only; version 2.5 only; version 2.5.0_beta1 only; …
• Sangoma FreePBX: version 2.4.0 only; version 2.5.0 only

Published 2009-05-28. Last modified 2026-06-16.