CVE-2026-16558

YMC Filter < 3.12.8 - Contributor+ Stored XSS via Layout Builder Schema

Published Aug 8, 2026 CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed
Description
The YMC Filter WordPress plugin before 3.12.8 does not sanitize and escape a layout builder setting before outputting it on a public endpoint, and does not verify object ownership when the setting is saved, allowing users with the Contributor role and above to store JavaScript that executes in the browser of any visitor viewing an affected filter.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Weaknesses CWE-285
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Wordpress
Wordpress wordpress
Ymc Filter
Ymc Filter ymc Filter
Weaknesses CWE-285
CWE-79
Vendors & Products Wordpress
Wordpress wordpress
Ymc Filter
Ymc Filter ymc Filter
Type Values Removed Values Added
Description The YMC Filter WordPress plugin before 3.12.8 does not sanitize and escape a layout builder setting before outputting it on a public endpoint, and does not verify object ownership when the setting is saved, allowing users with the Contributor role and above to store JavaScript that executes in the browser of any visitor viewing an affected filter.
Title YMC Filter < 3.12.8 - Contributor+ Stored XSS via Layout Builder Schema
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
WPScan
Published
Updated
Aug 10, 2026, 7:45 PM
Reserved
Jul 22, 2026, 12:09 PM
Status
Deferred
Published
Aug 8, 2026, 7:17 AM
Modified
Aug 26, 2026, 4:31 PM