Cross-Site Scripting (XSS) vulnerability in newwinform.php in GNUBOARD5 before 5.3.1.6 allows remote attackers to inject arbitrary web script or HTML via the popup title parameter.
Severity
CVSS 3.0
6.1 medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS
1.5% chance of exploitation in the next 30 days; higher than 74% of CVEs (scores of 2026-10-31)