CVE-2018-18676: Sir Gnuboard

Medium severity, CVSS 6.1. EPSS: 1.6% chance of exploitation in the next 30 days.

GNUBOARD5 5.3.1.9 has XSS that allows remote attackers to inject arbitrary web script or HTML via the "mobile board tail contents" parameter, aka the adm/board_form_update.php bo_mobile_content_tail parameter.

Affected products

• Sir Gnuboard: version 5.3.1.9 only

Published 2019-07-23. Last modified 2026-06-17.