CVE-2026-4093
In the Drupal 7 Term Reference Tree module, two stored XSS vectors exist in the widget/formatter rendering pipeline. Vector A (token display templates): When the Token module is enabled and token display templates are configured, attacker-controlled token output (e.g., term description) is rendered without proper sanitization. Any user who can edit the referenced taxonomy terms can inject HTML/JS that executes when the field is rendered. Vector B (term label rendering): Taxonomy term labels are not properly sanitized before being rendered in the widget, allowing a user with permission to create or edit taxonomy terms to inject scripts into the term name that execute when a form containing the widget is viewed. Exploit affects versions 7.x-1.x up to and including 7.x-1.11.
- Score
- CVSS 3.1 5.4 Medium
- Status
- Analyzed - mlhess@drupal.org
- Published
- 2026-05-21
- Last modified
- 2026-05-22
- Weaknesses
- CWE-79
Affected products
- Term Reference Tree (Drupal)
- Taxonomy Term Reference Tree Widget (Taxonomy Term Reference Tree Widget Project)
References
- https://d7es.tag1.com/security-advisories/taxonomy-term-reference-tree-widget-moderately-critical-cross-site-scripting
- https://www.herodevs.com/vulnerability-directory/cve-2026-4093
