CVE-2021-42091: Zammad

Critical severity, CVSS 9.1. EPSS: 1.1% chance of exploitation in the next 30 days.

An issue was discovered in Zammad before 4.1.1. SSRF can occur via GitHub or GitLab integration.

Affected products

• Zammad Zammad: before 4.1.1 (fixed in 4.1.1)

Published 2021-10-07. Last modified 2026-06-17.