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
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
N: Center for Digital Resilience
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.
Online version of this advisory: https://zammad.com/news/security-advisory-zaa-2020-09
Send all remarks to security issues to security @ zammad.com.