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-2024-03
  • Date: 2024-04-17
  • Title: Remote DoS via arbitrary method call
  • Severity: medium
  • Product: Zammad 6.2.x
  • Fixed in: Zammad 6.3.0
  • References:
    --> CVE-2024-33667

Vulnerability Descriptions

Remote DoS via arbitrary method call

An authenticated agent could perform a remote Denial of Service attack against Zammad by calling an endpoint that accepts a generic method name, which was not properly sanitized against an allowlist.

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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