Security Advisory

ZAA-2021-18

· 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-2021-18
  • Date: 10/05/2021
  • Title: Command Injection via Package installation
  • Severity: high
  • Product: Zammad 1.0.x up to 4.1.0
  • Fixed in: Zammad 4.1.1, 5.0.0
  • References:
    --> CVE: CVE-2021-42094

Vulnerability Descriptions

Command Injection via Package installation

Zammad comes with the functionality to upload custom Packages to extend it with features and more. However, there is the possibility to create files out of the application scope that an attacker can use to perform a Command Injection.

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:

Additional information

Online version of this advisory: https://zammad.com/en/advisories/zaa-2021-18

Send all remarks to security issues to security@zammad.com.

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