CVE-2012-4873: Sir Gnuboard

Medium severity, CVSS 4.3. EPSS: 1.6% chance of exploitation in the next 30 days.

Cross-site scripting (XSS) vulnerability in the file_download function in GNUBoard before 4.34.21 allows remote attackers to inject arbitrary web script or HTML via the filename parameter.

Affected products

• Sir Gnuboard: up to and including 4.34

Published 2012-09-06. Last modified 2026-06-16.