CVE-2026-96256 json
Gutenberg Essential Blocks <= 6.4.5 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'marker' Attribute
published 2026-10-01 39 d ago modified 2026-10-03 36 d ago also EUVD-2026-90594
- cvss
- 6.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 21%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 36 d ago
Exploit prediction
0.28% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
Affected products
- wpdevteam Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/606f25d9-f8c7-416a-8bb8-0cc57901ff5a?source=cve
- plugins.trac.wordpress.org /browser/essential-blocks/tags/6.4.5/assets/blocks/google-map/frontend.js#L1
- plugins.trac.wordpress.org /browser/essential-blocks/tags/6.4.5/includes/Blocks/GoogleMap.php#L82
- plugins.trac.wordpress.org /browser/essential-blocks/tags/6.4.5/src/blocks/google-map/src/save.js#L35
- plugins.trac.wordpress.org /browser/essential-blocks/tags/6.3.0/assets/blocks/google-map/frontend.js#L1
- plugins.trac.wordpress.org /browser/essential-blocks/tags/6.3.0/includes/Blocks/GoogleMap.php#L82
- plugins.trac.wordpress.org /browser/essential-blocks/tags/6.3.0/src/blocks/google-map/src/save.js#L35
- plugins.trac.wordpress.org /changeset?reponame=&new=3715353%40essential-blocks%2Ftags%2F6.4.6&old=3706819%40essential-blocks%2Ftags%2F6.4
- plugins.trac.wordpress.org /changeset/3715353/essential-blocks/trunk/assets/blocks/google-map/frontend.js
Sources
- CVE List CVE-2026-96256
- NVD CVE-2026-96256
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.