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-2022-08
  • Date: 07/05/2022
  • Title: Unauthorized Access
  • Severity: high
  • Product: Zammad 5.2.x
  • Fixed in: Zammad 5.2.1
  • References:
    --> CVE-2022-35487

Vulnerability Descriptions

Unauthorized Access

Zammad did not correctly perform authorization on certain attachment endpoints. This could be abused by an unauthenticated attacker to gain access to attachments, such as emails or attached files.

Special 🙏 and 🤘 and ❤️ to:

  • N: Erik Kipka, Wilfried Kirsch
  • C: softScheck GmbH
  • W:

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:

Send all remarks on security issues to

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