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-2021-20
  • Date: 10/28/2021
  • Title: Unauthorized Access
  • Severity: high
  • Product: Zammad 5.0.1
  • Fixed in: Zammad 5.0.2
  • References:
    --> CVE-2021-43145

Vulnerability Descriptions

Unauthorized Access

With certain LDAP configurations, Zammad was found to be vulnerable to unauthorized access with existing user accounts.

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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