CVE-2026-2951
Stored XSS in Gutentor WordPress Plugin Allows Script Injection
Publication date: 2026-04-23
Last updated on: 2026-04-23
Assigner: Wordfence
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| gutentor | gutentor_gutenberg_blocks | to 3.5.5 (inc) |
Helpful Resources
Exploitability
| 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
AI Powered Q&A
Can you explain this vulnerability to me?
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.
How can this vulnerability impact me? :
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.