CVE-2017-6080: Zammad

Critical severity, CVSS 9.8. EPSS: 0.7% chance of exploitation in the next 30 days.

An issue was discovered in Zammad before 1.0.4, 1.1.x before 1.1.3, and 1.2.x before 1.2.1, caused by lack of a protection mechanism involving HTTP Access-Control headers. To exploit the vulnerability, an attacker can send cross-domain requests directly to the REST API for users with a valid session cookie and receive the result.

Affected products

• Zammad Zammad: up to and including 1.0.3; version 1.1.0 only; version 1.1.1 only; version 1.1.2 only; version 1.2.0 only

Published 2017-03-13. Last modified 2026-06-17.