CVE-2026-4267: The Query Monitor plugin for WordPress has Reflected Cross-Site Scripting via Request URI

medium Affects johnbillion/query-monitor. Feed 2026.10.29.1, updated 2026-10-28; published .

The Query Monitor plugin for WordPress has Reflected Cross-Site Scripting via Request URI

Package
johnbillion/query-monitor Composer
Affected versions
<3.20.4
Fixed in
3.20.4
Severity
medium  CVSS 6.1
Exploitation
not on CISA KEV · EPSS 0% (23.5th percentile)
Published
2026-03-19
Source
osv.dev

References

CWE-80
NVD recordjohnbillion/query-monitor advisories

Am I affected?

Find out in one command. phpwarden checks your composer.lock against this advisory and 20,000+ others, ranked by real-world exploitation (CISA KEV + EPSS). Free, offline, open data.

# one-time install
pip install phpwarden

# then
phpwarden deps composer.lock

Or keep it checked automatically: GitHub Action · pre-commit hook · GitLab CI · Laravel artisan command

Install docs   How findings are ranked

Related advisories