CVE-2026-4267
Query Monitor <= 3.20.3 - Reflected Cross-Site Scripting via Request URI
CVSS Score
7.2
EPSS Score
0.0%
EPSS Percentile
0th
The Query Monitor – The developer tools panel for WordPress plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the ‘$_SERVER['REQUEST_URI']’ parameter in all versions up to, and including, 3.20.3 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.
| CWE | CWE-79 |
| Vendor | johnbillion |
| Product | query monitor |
| Published | Mar 31, 2026 |
| Last Updated | Apr 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
johnbillion / Query Monitor
0 ≤ 3.20.3
References
wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/0b75cad9-9f76-4839-8eb2-40d84662846d?source=cve plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/query-monitor/tags/3.20.2/output/html/request.php#L60 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/query-monitor/tags/3.20.2/output/html/request.php#L70 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/changeset/3486705/query-monitor research.cleantalk.org: https://research.cleantalk.org/cve-2026-4267/
Credits
Dmitrii Ignatyev