Security Advisory


· Please read carefully and check if the version of your Zammad system is affected by this vulnerability. Please send us information regarding vulnerabilities in Zammad!

Security Advisory Details

  • ID: ZAA-2023-08
  • Date: 2023-12-06
  • Title: Information Disclosure
  • Severity: low
  • Product: Zammad 6.1.x
  • Fixed in: Zammad 6.2.0
  • References:
    --> CVE-2023-50453

Vulnerability Descriptions

Information Disclosure

Zammad uses the public endpoint /api/v1/signshow for its login screen. This endpoint would return internal configuration data of user object attributes, like selectable values, which should not be visible in public.

Special 🙏 and 🤘 and ❤️ to:

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:

Please send remarks on security issues exclusively to

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