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-2022-12
  • Date: 2022-12-21
  • Title: Incorrect Access Control
  • Severity: low
  • Product: Zammad 5.3.x
  • Fixed in: Zammad 5.3.1
  • References:
    --> CVE-2022-48023

Vulnerability Descriptions

Incorrect Access Control

Due to insufficient privilege verification, an authenticated attacker could perform changes on the tags of their customer tickets using the Zammad API. This is now corrected so that only agents with write permission may change ticket tags.

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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