CVE-2020-29158: Zammad

Medium severity, CVSS 4.3. EPSS: 0.7% chance of exploitation in the next 30 days.

An issue was discovered in Zammad before 3.5.1. An Agent with Customer permissions in a Group can bypass intended access control on internal Articles via the Ticket detail view.

Affected products

• Zammad Zammad: before 3.5.1 (fixed in 3.5.1)

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