Threat database

A vulnerability in Zammad GmbH's Zammad DEB and RPM packages allows a local attacker with write privileges as the unprivileged zammad service account to escalate to full root privileges. This occurs because service processes temporarily run as root and execute files writable by the zammad account before dropping privileges. The affected services automatically restart without administrator intervention, enabling rapid privilege escalation. Only DEB and RPM package installations are affected; source and official container image installations are not impacted. All released packaged versions from 1.5.0 up to but not including 7.2.2 and 7.1.0-alpha are vulnerable.

Zammad versions 6.3.0 through 6.5.3 contain a session hijacking vulnerability that can lead to remote code execution as the zammad user. Versions 7.0.0 through 7.1.2 also contain the bug, but it is not exploitable due to framework changes. The vulnerability has a high severity with a CVSS 4.0 score of 8.7.