Answer in brief
CVE-2026-96256 records a Medium severity (CVSS 6.4) vulnerability in Gutenberg Essential Blocks <= 6.4.5 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'marker' Attribute. The current sources do not mark it as known exploited. The current feed maps wpdevteam/Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns (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 6.4. 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 wpdevteam/Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| wpdevteam/Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patternsgeneric | >=0 <=6.4.5 | Not reported |
Published upstream
Oct 1, 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
The Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Google Map block's 'marker' attribute in versions up to, and including, 6.4.5 This is due to insufficient input sanitization and output escaping on marker title/content values, which are stored as JSON and then decoded and concatenated directly into raw HTML by the frontend script's InfoWindow content builder. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Quoted source text, attributed separately from HOL analysis.