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Vulnerability · Published Oct 1, 2026 · Assigned by Wordfence

CVE-2026-96256Gutenberg Essential Blocks <= 6.4.5 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'marker' Attribute

Medium 6.4

In plain English

A medium-severity cross-site scripting in Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns from wpdevteam. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities).

Severity (CVSS 3.1)6.4Medium
Exploit odds (30 days)0.3%top 79.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

VendorProductVersions
wpdevteam Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns 0 – through 6.4.5

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

References