Answer in brief
CVE-2026-12256 records a High severity (CVSS 8.8) vulnerability in WordPress Fusion Builder plugin <= 3.15.3 - PHP Object Injection vulnerability. The current sources do not mark it as known exploited. The current feed maps ThemeFusion/fusion-builder (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.8. 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 ThemeFusion/fusion-builder (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| ThemeFusion/fusion-buildergeneric | >=0 <=3.15.3 | Not reported |
Published upstream
Jun 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 1, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 1, 2026
Deserialization of Untrusted Data vulnerability in ThemeFusion Fusion Builder fusion-builder allows Object Injection.This issue affects Fusion Builder: from n/a through 3.15.3.
Quoted source text, attributed separately from HOL analysis.