Reflected Cross-Site Scripting Vulnerability in Query Monitor Plugin for WordPress
CVE-2026-4267

7.2HIGH

Key Information:

Vendor

WordPress
Status
Query Monitor – The Developer Tools Panel For WordPress
Vendor
CVE Published:
31 March 2026

What is CVE-2026-4267?

The Query Monitor plugin for WordPress has a vulnerability that allows unauthenticated attackers to exploit insufficient input sanitization and output escaping. By manipulating the ‘$_SERVER['REQUEST_URI']’ parameter, attackers can inject arbitrary web scripts into web pages. This can facilitate attacks where users are tricked into clicking links, potentially leading to unauthorized actions and data exposure on the affected sites.

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Affected Version(s)

Query Monitor – The developer tools panel for WordPress * <= 3.20.3

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/query-monitor/...
https://plugins.trac.wordpress.org/browser/query-monitor/...

CVSS V3.1

Score:
7.2
Severity:
HIGH
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Dmitrii Ignatyev
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