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-2023-05
  • Date: 2023-12-06
  • Title: Information Disclosure
  • Severity: medium
  • Product: Zammad 6.1.x
  • Fixed in: Zammad 6.2.0
  • References:
    --> CVE-2023-50457

Vulnerability Descriptions

Information Disclosure

When listing tickets linked to a knowledge base answer, or knowledge base answers of a ticket, a user could see entries they have no permission for.

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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