Please read carefully and check if the version of your Zammad system is affected by this vulnerability. Please send information regarding vulnerabilities in Zammad to: security at zammad.com
Zammad comes with a functionality to add Tags to Tickets. Added Tags are shown to the Agent in the Ticket view. However, when rendering the Tags no proper quoting is in place so the raw text is added to the DOM and rendered. This allows an attacker to store malicious code to a Ticket that will be evaluated when opening a Ticket.
Special 🙏 and 🤘 and ❤️ to:
N: Michał Błaszczak
C: Zdalny Admln
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.
Online version of this advisory: https://zammad.com/news/security-advisory-zaa-2020-21
Send all remarks to security issues to security @ zammad.com.