CVE-2026-53987 Tag Plugin for GLPI 11 before 2.14.4 Stored Cross-Site Scripting in Kanban Badge Rendering
Authenticated users can inject malicious scripts via tag names that execute in other users' browsers when viewing Kanban boards.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-53987?
CVE-2026-53987 is a high-severity cross-site scripting vulnerability in pluginsGLPI tag, published on 9 Jul 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
The Tag plugin for GLPI 11 before 2.14.4 stores the tag name without HTML sanitization and renders it into the Kanban badge markup via PluginTagTag::preKanbanContent() without output escaping, resulting in stored cross-site scripting. An authenticated user with TAG MANAGEMENT create or update rights can set a tag name containing HTML, which then executes in the browser of any user who opens the Kanban view of a ticket, problem, change, or project the tag is attached to.
Weakness: CWE-79
Which versions are affected by CVE-2026-53987?
How do I fix CVE-2026-53987?
No fix has been published for CVE-2026-53987 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-53987 being exploited?
There is no known exploitation of CVE-2026-53987 in the wild and no public exploit code.
Sources
Also known as GHSA-6rpj-89c7-x2mh, GHSA-qc6r-wrm6-23pm.