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-2024-02
  • Date: 2024-04-17
  • Title: Insecure Direct Object Reference
  • Severity: low
  • Product: Zammad 6.2.x
  • Fixed in: Zammad 6.3.0
  • References:
    --> CVE-2024-33668

Vulnerability Descriptions

Insecure Direct Object Reference

The Zammad Upload Cache uses insecure, partially guessable FormIDs to identify content. An attacker could try to brute force them to upload malicious content to article drafts they have no access to.

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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