Security Advisory
ZAA-2022-11
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Security Advisory Details
- ID: ZAA-2022-11
- Date: 2022-12-21
- Title: Multiple Vulnerabilities
- Severity: critical
- Product: Zammad 5.3.x
- Fixed in: Zammad 5.3.1
- References:
--> CVE-2022-48021
Vulnerability Descriptions
Multiple Vulnerabilities
The Zammad front end can communicate with the server bi-directionally through a web socket connection or via AJAX. An attacker could send a specially crafted message to the server, causing this message to be sent to all active front ends, which would then react to the payload. This would enable the attacker to abuse their session to perform malicious changes in their front end (Remote Code Execution) and (with their permission set) also on the server (Privilege Escalation).
Special 🙏 and 🤘 and ❤️ to:
- N: Dominik Büttner
- C: CSYS GmbH
- W: https://csys.de/
Recommended Resolution
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: https://zammad.com/en/advisories/zaa-2022-11
Please send remarks on security issues exclusively to security@zammad.com.