High severity7.2NVD Advisory· Published Mar 31, 2026· Updated Apr 24, 2026
CVE-2026-4267
CVE-2026-4267
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
johnbillion/query-monitorPackagist | < 3.20.4 | 3.20.4 |
Affected products
1Patches
Vulnerability mechanics
References
7- github.com/advisories/GHSA-2xr4-chcf-vmvfghsaADVISORY
- github.com/johnbillion/query-monitor/security/advisories/GHSA-2xr4-chcf-vmvfghsaWEB
- plugins.trac.wordpress.org/browser/query-monitor/tags/3.20.2/output/html/request.phpnvd
- plugins.trac.wordpress.org/browser/query-monitor/tags/3.20.2/output/html/request.phpnvd
- plugins.trac.wordpress.org/changeset/3486705/query-monitornvd
- research.cleantalk.org/cve-2026-4267/nvd
- www.wordfence.com/threat-intel/vulnerabilities/id/0b75cad9-9f76-4839-8eb2-40d84662846dnvd
News mentions
1- Wordfence Intelligence Weekly WordPress Vulnerability Report (March 30, 2026 to April 5, 2026)Wordfence Blog · Apr 9, 2026