CVE-2023-31597: Zammad

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

An issue in Zammad v5.4.0 allows attackers to bypass e-mail verification using an arbitrary address and manipulate the data of the generated user. Attackers are also able to gain unauthorized access to existing tickets.

Affected products

• Zammad Zammad: before 5.4.1 (fixed in 5.4.1)

Published 2023-05-18. Last modified 2026-06-17.