Answer in brief
CVE-2026-16558 records a Unknown severity vulnerability in YMC Filter < 3.12.8 - Contributor+ Stored XSS via Layout Builder Schema. The current sources do not mark it as known exploited. The current feed maps Unknown/YMC Filter (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Unknown/YMC Filter (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Unknown/YMC Filtergeneric | >=3.6.0 <3.12.8 | 3.12.8 |
Published upstream
Aug 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 8, 2026
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.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-16558 records a Unknown severity vulnerability in YMC Filter < 3.12.8 - Contributor+ Stored XSS via Layout Builder Schema. The current sources do not mark it as known exploited. The current feed maps Unknown/YMC Filter (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Unknown/YMC Filter (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Unknown/YMC Filtergeneric | >=3.6.0 <3.12.8 | 3.12.8 |
Published upstream
Aug 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 8, 2026
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.
Quoted source text, attributed separately from HOL analysis.