What the vulnerability does
01Description
The Gutenverse – Ultimate Block Addons and Page Builder for Site Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's countdown Block in all versions up to, and including, 2.2.1 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
Gutenverse allows authenticated users to inject malicious scripts that execute in other users' browsers. An attacker with a low-privilege account can craft a payload that affects site visitors and administrators across the WordPress installation. The vulnerability stems from insufficient input sanitization in the plugin's block handling. Update to a version newer than 2.2.1.
What an attacker can do
03Attacker Capabilities
Inject JavaScript that runs in other users' browsers, potentially stealing credentials or performing actions on their behalf.
Potential impact on your site
04Site Impact
Authenticated attackers can compromise admin and visitor sessions, deface content, or steal sensitive data without requiring clicks or special setup.
Conditions required to exploit
05Prerequisites
Attacker needs a low-privilege WordPress account (subscriber or contributor level). No user interaction required from the victim.
Key dates
06Disclosure timeline
April 29, 2025
CVE published
April 8, 2026
Record updated
