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7.6
CVE-2026-4093: Drupal 7 Term Reference Tree can run malicious scripts
CVE-2026-4093 · published 5 months ago
Summary
The Term Reference Tree add‑on for Drupal 7 lets someone who can edit taxonomy terms insert hidden code that runs when the field is shown. This affects versions up to 7.x‑1.11. Upgrade to a newer release or remove the add‑on to stop the risk.
What to do
- Update taxonomy_term_reference_tree_widget_project taxonomy_term_reference_tree_widget to version 7.x-1.12 or later.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| taxonomy_term_reference_tree_widget_project | taxonomy_term_reference_tree_widget |
>= 7.x-1.0, < 7.x-1.12 cpe:2.3:a:taxonomy_term_reference_tree_widget_project:taxonomy_term_reference_tree_widget:*:*:*:*:*:drupal:*:* |
Original advisory text
Stored XSS in Drupal 7 Term Reference Tree module (token display templates and term labels)
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.
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.
References
- https://d7es.tag1.com/security-advisories/taxonomy-term-reference-tree-widget-mo... Vendor Advisory
- https://www.herodevs.com/vulnerability-directory/cve-2026-4093 Vendor Advisory
- https://git.drupalcode.org/project/term_reference_tree URL
- https://www.drupal.org/project/term_reference_tree URL
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4093.j... Vendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-4093 Vendor Advisory
Internet-facing
60 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit
- Gives an attacker partial control
Severity
7.6
High
Type
CWE-79Cross-site Scripting (XSS)
Timeline
Published21 May 2026
Updated26 Oct 2026
First seen21 May 2026
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