CVE-2026-4267

Query Monitor <= 3.20.3 - Reflected Cross-Site Scripting via Request URI

CVSS 7.2 HIGHEPSS 0.3%CWE-79

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 7.2EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

31 Mar 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Affected products

johnbillion · Query Monitor

Want to know if your infrastructure is exposed to this?

Talk to TrueHacking →

References

https://plugins.trac.wordpress.org/browser/query-monitor/tags/3.20.2/output/html/request.php#L60 https://plugins.trac.wordpress.org/browser/query-monitor/tags/3.20.2/output/html/request.php#L70 https://plugins.trac.wordpress.org/changeset/3486705/query-monitor https://research.cleantalk.org/cve-2026-4267/https://www.wordfence.com/threat-intel/vulnerabilities/id/0b75cad9-9f76-4839-8eb2-40d84662846d?source=cve