CVE-2013-6129: vBulletin

High severity, CVSS 7.5. EPSS: 51.9% chance of exploitation in the next 30 days.

The install/upgrade.php scripts in vBulletin 4.1 and 5 allow remote attackers to create administrative accounts via the customerid, htmldata[password], htmldata[confirmpassword], and htmldata[email] parameters, as exploited in the wild in October 2013.

Affected products

• vBulletin vBulletin: version 4.1 only; version 5.0.0 only

Published 2013-10-19. Last modified 2026-06-17.