Web-based Helpdesk System Vulnerability in Zammad by Zammad GmbH
CVE-2026-63216

5.3MEDIUM

Key Information:

Vendor

Zammad

Status
Zammad
Vendor
CVE Published:
25 September 2026

What is CVE-2026-63216?

Zammad, an open-source helpdesk and customer support system, contains a vulnerability in its configuration dialogs for AI Agents that allows unsanitized option labels to be rendered as raw HTML. This flaw enables an attacker to inject harmful HTML and JavaScript into the system. Specifically, if an attacker can manipulate an option label—such as through a malicious user or organization name—they can craft a payload that executes in the browser of any administrator or agent accessing the affected configuration view. This critical issue has been addressed in version 7.1.2.

Affected Version(s)

zammad < 7.1.2

References

https://github.com/zammad/zammad/security/advisories/GHSA...
x_refsource_CONFIRM
https://github.com/zammad/zammad/commit/74b4fd4db62dc3652...
x_refsource_MISC

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.