CVE-2021-35302: Zammad

Medium severity, CVSS 5.3. EPSS: 1.2% chance of exploitation in the next 30 days.

Incorrect Access Control for linked Tickets in Zammad 1.0.x up to 4.0.0 allows remote attackers to obtain sensitive information.

Affected products

• Zammad Zammad: from 1.0.0, up to and including 4.0.0

Published 2021-06-28. Last modified 2026-06-17.