What’s Vulnerable › Vulnerabilities
CVE-2026-16558: YMC Filter < 3.12.8 - Contributor+ Stored XSS via Layout Builder Schema
- Severity: medium (CVSS 5.4 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-08-08 · updated 2026-08-26
- Weakness: CWE-79
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.
Affected products
- YMC Filter: from 3.6.0 before 3.12.8 — fixed in 3.12.8
How to fix
Upgrade to a fixed version: YMC Filter 3.12.8. Check the vendor advisory for mitigations.
References
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