CVE-2018-18678: Sir Gnuboard

Medium severity, CVSS 6.1. EPSS: 1.1% chance of exploitation in the next 30 days.

GNUBOARD5 before 5.3.2.0 has XSS that allows remote attackers to inject arbitrary web script or HTML via the "board group extra contents" parameter, aka the adm/boardgroup_form_update.php gr_1~10 parameter.

Affected products

• Sir Gnuboard: before 5.3.2.0 (fixed in 5.3.2.0)

Published 2019-10-30. Last modified 2026-06-17.