CVE-2026-2951
Received Received - Intake

Stored XSS in Gutentor WordPress Plugin Allows Script Injection

Publication date: 2026-04-23

Last updated on: 2026-04-23

Assigner: Wordfence

Description
The Gutentor – Gutenberg Blocks – Page Builder for Gutenberg Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 3.5.5 due to insufficient input sanitization and output escaping. 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.

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Meta Information

Published
2026-04-23
Last Modified
2026-04-23
Generated
2026-07-06
AI Q&A
2026-04-23
EPSS Evaluated
2026-07-05
NVD
CVE-2026-2951
EUVD
EUVD-2026-25168

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
gutentor gutentor_gutenberg_blocks to 3.5.5 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Attack-Flow Graph

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Executive Summary

The vulnerability exists in the Gutentor – Gutenberg Blocks – Page Builder for Gutenberg Editor plugin for WordPress, specifically in versions up to and including 3.5.5.

It is a Stored Cross-Site Scripting (XSS) vulnerability caused by insufficient input sanitization and output escaping.

This flaw allows authenticated attackers with contributor-level access or higher to inject arbitrary web scripts into pages.

These injected scripts execute whenever any user accesses the compromised page.

Impact Analysis

An attacker with contributor-level access or above can exploit this vulnerability to inject malicious scripts into pages.

These scripts execute in the context of users visiting the infected pages, potentially leading to theft of user data, session hijacking, or other malicious actions.

The vulnerability has a CVSS v3.1 base score of 5.4, indicating a medium severity with network attack vector, low attack complexity, and requiring privileges but user interaction.

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