Security Advisory
ZAA-2021-04
· 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-2021-04
- Date: 06/08/2020
- Title: Incorrect access control for linked Tickets
- Severity: medium
- Product: Zammad 1.0.x up to 4.0.0
- Fixed in: Zammad 4.0.1, 4.1.0
- References:
--> CVE: CVE-2021-35302
Vulnerability Descriptions
Incorrect access control for linked Tickets
Zammad comes with a functionality to link Tickets to one another. This enables to create a context of the current topic at hand. While gathering all linked Tickets of the current Ticket the access control was faulty. This way an attacker could see information that should not be accessible.
Special 🙏 and 🤘 and ❤️ to:
- N: Alexander Willner
- D: Wissenschaftlicher Mitarbeiter bei Fraunhofer FOKUS
- W: https://www.linkedin.com/in/willner/
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:
- https://zammad.org/
- https://ftp.zammad.com/
Or just update your Zammad if installed via OS package manager.
Additional information
Online version of this advisory: https://zammad.com/en/advisories/zaa-2021-04
Send all remarks to security issues to security@zammad.com.