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-2022-01
  • Date: 03/14/2022
  • Title: Unauthorized Access
  • Severity: medium
  • Product: Zammad 5.0.x
  • Fixed in: Zammad 5.1.0
  • References:
    --> CVE-2022-27332

Vulnerability Descriptions

Unauthorized Access

Due to incorrect access checking, attackers would be able to write entries to the CTI caller log without authentication. This could be used to perform Denial of Service or Phishing attacks.

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 on security issues to

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