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Please read carefully and check if the version of your Zammad system is affected by this vulnerability. Please send information regarding vulnerabilities in Zammad to: security at zammad.com

Security Advisory Details

Vulnerability Descriptions

Source Code Disclosure (CVE pending)

Zammad returns source code of static resources when submitting an OPTIONS request, rather than a GET request.
Disclosure of source code allows for an attacker to formulate more precise attacks. Source code was disclosed for the file 404.html (/zammad/public/404.html)

Special 🙏 and 🤘 and ❤️ to:

N: Guardian Project
W: https://guardianproject.info

N: Center for Digital Resilience
W: https://digiresilience.org

Recommended Resolution

This vulnerability is fixed in the latest versions of Zammad and it is recommended to upgrade to one of these.

Fixed releases can be found at:

Or just update your Zammad if installed via OS package manager.

Additional information

Online version of this advisory: https://zammad.com/news/security-advisory-zaa-2020-09

Send all remarks to security issues to security @ zammad.com.