What the vulnerability does
01Description
The Gutenberg Blocks – PublishPress Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'Marker Title' and 'Marker Description' parameters for the Maps block in versions up to, and including, 3.3.4 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.
Explanation of Vulnerability in Simple Terms
02Summary
PublishPress Blocks contains a cross-site scripting (XSS) vulnerability in versions up to 3.3.4. An authenticated user with low privileges can inject malicious scripts that execute in the browsers of other site users, potentially compromising their accounts or stealing sensitive data. The vulnerability affects block controls, visibility, and permissions features.
What an attacker can do
03Attacker Capabilities
Inject malicious JavaScript that runs in other users' browsers when they view affected pages.
Potential impact on your site
04Site Impact
Authenticated users can be compromised; attackers may steal admin credentials, modify content, or inject malware.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege WordPress account (e.g., contributor or editor role).
Key dates
06Disclosure timeline
October 25, 2025
CVE published
April 8, 2026
Record updated
