CVE-2026-96256Gutenberg Essential Blocks <= 6.4.5 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'marker' Attribute
Updated under an hour ago ()
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It affects wpdevteam Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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.
- CVSS
- 6.4 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
- Weakness (CWE)
- CWE-79
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Wordfence
- NVD analysis
- Deferred
- Record last updated
- Oct 3, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
wpdevteam Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns wpdevteam:gutenberg_essential_blocks_page_builder_for_gutenberg_blocks_and_patterns (from the name) | through 6.4.5 | CNA record |
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/606f25d9-f8c7-416a-8bb8-0cc57901ff5a?source=cve
- https://plugins.trac.wordpress.org/browser/essential-blocks/tags/6.4.5/assets/blocks/google-map/frontend.js#L1
- https://plugins.trac.wordpress.org/browser/essential-blocks/tags/6.4.5/includes/Blocks/GoogleMap.php#L82
- https://plugins.trac.wordpress.org/browser/essential-blocks/tags/6.4.5/src/blocks/google-map/src/save.js#L35
- https://plugins.trac.wordpress.org/browser/essential-blocks/tags/6.3.0/assets/blocks/google-map/frontend.js#L1
- https://plugins.trac.wordpress.org/browser/essential-blocks/tags/6.3.0/includes/Blocks/GoogleMap.php#L82
- https://plugins.trac.wordpress.org/browser/essential-blocks/tags/6.3.0/src/blocks/google-map/src/save.js#L35
- https://plugins.trac.wordpress.org/changeset?reponame=&new=3715353%40essential-blocks%2Ftags%2F6.4.6&old=3706819%40essential-blocks%2Ftags%2F6.4.5
- https://plugins.trac.wordpress.org/changeset/3715353/essential-blocks/trunk/assets/blocks/google-map/frontend.js
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.