Vulnerability · Published Aug 8, 2026 · Assigned by WPScan
CVE-2026-16558YMC Filter < 3.12.8 - Contributor+ Stored XSS via Layout Builder Schema
Medium 5.4
In plain English
A medium-severity cross-site scripting in YMC Filter from Unknown. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities).
Severity (CVSS 3.1)5.4Medium
Exploit odds (30 days)0.2%top 86.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Unknown | YMC Filter | 3.6.0 – before 3.12.8 |
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
References
- https://wpscan.com/vulnerability/06ba0551-deab-41fb-b501-eef0727b431a/ exploit, vdb-entry, technical-description