PT-2026-26494 · Johnbillion+1 · Query Monitor+2
Dmitry Ignatyev
·
Published
2026-03-19
·
Updated
2026-04-05
·
CVE-2026-4267
CVSS v3.1
7.2
High
| Vector | AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
Name of the Vulnerable Software and Affected Versions
Query Monitor versions prior to 3.20.4
Description
The Query Monitor plugin for WordPress is susceptible to Reflected Cross-Site Scripting due to insufficient input sanitization and output escaping. This allows unauthenticated attackers to inject arbitrary web scripts into pages that execute if a user is tricked into performing an action, such as clicking a link. The issue stems from the plugin reading user-controlled data from the
$ SERVER['REQUEST URI'] parameter and rendering it without proper HTML escaping. Specifically, the format url() function returns the attacker-supplied string without escaping if it does not contain an ampersand (&), allowing injected HTML or JavaScript to be inserted directly into the page. The vulnerable parameter is $ SERVER['REQUEST URI'].Recommendations
Update to Query Monitor version 3.20.4 or later.
Fix
XSS
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Related Identifiers
Affected Products
Query Monitor
Query Monitor – The Developer Tools Panel For Wordpress
Johnbillion/Query-Monitor