CVE-2026-16558

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

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.

Affected

YMC Filter

CVSS v3.1 CNA

5.4 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS

0.23% chance of exploitation in the next 30 days, 12th percentile

Published

2026-08-08

Updated

2026-08-10

Proof-of-concept exploits (1)

• https://wpscan.com/vulnerability/06ba0551-deab-41fb-b501-eef0727b431a/

References

• CVE Record
• NVD entry