CVE-2021-35489: Thruk

Medium severity, CVSS 6.1. EPSS: 0.9% chance of exploitation in the next 30 days.

Thruk 2.40-2 allows /thruk/#cgi-bin/extinfo.cgi?type=2&host={HOSTNAME]&service={SERVICENAME]&backend={BACKEND] Reflected XSS via the host or service parameter. An attacker could inject arbitrary JavaScript into extinfo.cgi. The malicious payload would be triggered every time an authenticated user browses the page containing it.

Affected products

• Thruk Thruk: version 2.40-2 only

Published 2021-11-09. Last modified 2026-06-17.