CVE-2005-4621: Jelsoft vBulletin

Medium severity, CVSS 4.3. EPSS: 1.2% chance of exploitation in the next 30 days.

Cross-site scripting (XSS) vulnerability in the editavatar page in vBulletin 3.5.1 allows remote attackers to inject arbitrary web script or HTML via a URL in the remote avatar url field, in which the URL generates a parsing error, and possibly requiring a trailing extension such as .jpg.

Affected products

• Jelsoft vBulletin: version 1.0.1 only; version 2.0.3 only; version 2.0_rc2 only; version 2.0_rc3 only; version 2.2.0 only; version 2.2.1 only; …

Published 2005-12-31. Last modified 2026-06-16.