WordPress <= 6.9.1 - Cross-Site Scripting via Client-Side Template Override in Admin Area
| CVSS | 4.4 (Medium) |
|---|---|
| Publicly Published | March 10, 2026 |
| Last Updated | March 11, 2026 |
| Researcher |
Asaf Mozes
|
Description
WordPress core is vulnerable to Cross-Site Scripting via client-side template overriding in the admin area in all versions up to and including 6.9.1. The `wp.template()` JavaScript function uses `document.getElementById()` to locate templates, which matches any HTML element by ID regardless of element type. WordPress admin templates are intended to be `<script type="text/html" id="tmpl-*">` elements, but `getElementById` also matches `<div>`, `<img>`, and other injected elements. If an attacker can inject a non-script element with a matching `tmpl-*` ID, the template content is overridden with attacker-controlled HTML, which is then compiled by Underscore.js `_.template()` with JavaScript execution support. This is a conditional vulnerability that requires an existing HTML injection vector in the admin context.
Learn more about Cross-Site Scripting vulnerabilities and how to prevent them.
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Vulnerability Details for WordPress
| Software Type | Core |
|---|---|
| Patched? | Yes |
| Remediation | Update to one of the following versions, or a newer patched version: 6.8.4, 6.9.2 |
| Affected Versions |
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| Patched Versions |
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