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-2021-21
  • Date: 12/07/2021
  • Title: Information Disclosure
  • Severity: low
  • Product: Zammad 5.0.2
  • Fixed in: Zammad 5.0.3
  • References:
    --> CVE-2021-44886

Vulnerability Descriptions

Information Disclosure

In Zammad, agents can configure "out of office" periods and substitute persons. If the substitute persons didn't have the same permissions as the original agent, they could receive ticket notifications for tickets that 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:

Additional information

Online version of this advisory:

Send all remarks to security issues to

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