Vulnerability
CVE-2026-84463
Descriptive record received from OpenCTI and minimised for consultation in the Intel portal.
- Sharing
- PUBLIC-OSINT
- Confidence
- 100
- Source
- The CVE Program
- Updated
- 26/09/2026 04:54
Description
Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, a user with Knowledge Base editing rights for a category can embed a video widget in a published answer with a specially crafted value. When the answer is rendered, that value is inserted into the page's HTML without being escaped for its attribute context, allowing it to break out and inject additional HTML into the page. When another user who has permission to switch between user sessions views the affected answer, the injected HTML causes their browser to silently send a request to Zammad's session-switching endpoint using their own active credentials. This results in switching their session to an account chosen by the person who wrote the Knowledge Base answer. No action is required from the viewer beyond opening the published answer. This issue is fixed in version 7.1.2.
Aliases and classifications
CWE-352CWE-79CWE-838Cross-Site Request Forgery (CSRF)Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Inappropriate Encoding for Output Context
Minimised technical details
No raw data- cisa kev
- False
Provenance
Public references
- https://github.com/zammad/zammad/security/advisories/GHSA-cxjg-4gmf-5xqc
https://github.com/zammad/zammad/security/advisories/GHSA-cxjg-4gmf-5xqc - https://github.com/zammad/zammad/commit/f7a97ea209696bce85ed62901ee753b88368851c
https://github.com/zammad/zammad/commit/f7a97ea209696bce85ed62901ee753b88368851c
EudorIA correlation
Intel catalogue
The vulnerability is also available in the EudorIA editorial catalogue.
Open EudorIA analysisPresence in OpenCTI describes an intelligence correlation and does not, by itself, constitute evidence of compromise, legal attribution or operational guidance applicable without context verification.