What the vulnerability does
01Description
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in ThemeHunk Gutenberg Blocks unlimited-blocks allows Reflected XSS.This issue affects Gutenberg Blocks: from n/a through <= 1.2.8.
Explanation of Vulnerability in Simple Terms
02Summary
Gutenberg Blocks versions up to 1.2.8 contain a cross-site scripting vulnerability that allows attackers to inject malicious scripts. An attacker can craft a malicious link or page that, when visited by a site administrator or user, executes arbitrary JavaScript in their browser. This can lead to session hijacking, credential theft, or unauthorized actions performed on behalf of the victim.
What an attacker can do
03Attacker Capabilities
Inject and execute malicious JavaScript in a user's browser to steal credentials or perform unauthorized actions.
Potential impact on your site
04Site Impact
Administrators and users visiting compromised pages risk session hijacking, data theft, and unauthorized site modifications.
Conditions required to exploit
05Prerequisites
A user must visit a malicious link or page crafted by the attacker; no authentication required.
Key dates
06Disclosure timeline
March 19, 2026
CVE published
April 28, 2026
Record updated