What the vulnerability does
01Description
The Colibri Page Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's colibri_newsletter shortcode in all versions up to, and including, 1.0.334 due to insufficient input sanitization and output escaping on user supplied attributes. 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
Colibri Page Builder versions up to 1.0.334 contain a stored cross-site scripting (XSS) vulnerability. An authenticated user with low privileges can inject malicious scripts that execute in the browsers of other site visitors, potentially compromising their sessions or stealing sensitive data. The vulnerability affects the page builder interface and can impact site administrators and other users.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that run in other users' browsers when they view affected pages.
Potential impact on your site
04Site Impact
Authenticated users can inject scripts affecting other visitors; admin accounts and user data are at risk.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege authenticated account on the site.
Key dates
06Disclosure timeline
October 11, 2025
CVE published
April 8, 2026
Record updated
