What the vulnerability does
01Description
The YouTube Subscribe plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 3.0.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.
Explanation of Vulnerability in Simple Terms
02Summary
The YouTube Subscribe product contains a cross-site scripting (XSS) vulnerability in versions up to 3.0.0. An attacker with high privileges can inject malicious scripts that execute in users' browsers, potentially affecting other parts of the site. The vulnerability requires high attack complexity and does not require user interaction to trigger.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that execute in users' browsers and affect other site components.
Potential impact on your site
04Site Impact
An authenticated admin or editor could inject scripts affecting site visitors and other users.
Conditions required to exploit
05Prerequisites
Attacker must have high-level privileges (e.g., admin or editor role) on the site.
Key dates
06Disclosure timeline
November 25, 2025
CVE published
April 8, 2026
Record updated
