CVE-2020-26033: Zammad

Medium severity, CVSS 5.4. EPSS: 0.4% chance of exploitation in the next 30 days.

An issue was discovered in Zammad before 3.4.1. The Tag and Link REST API endpoints (for add and delete) lack a CSRF token check.

Affected products

• Zammad Zammad: from 1.0.0, before 3.4.1 (fixed in 3.4.1)

Published 2020-12-28. Last modified 2026-06-17.