What the vulnerability does
01Description
The WP YouTube Video Optimizer plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'ib_youtube' shortcode in all versions up to, and including, 1.2 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
WP YouTube Video Optimizer versions 1.2 and earlier contain a cross-site scripting vulnerability. An authenticated user with low privileges can inject malicious scripts that execute in other users' browsers, including site administrators. The vulnerability has scope change, meaning the impact extends beyond the plugin itself to affect the broader site.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that run in other users' browsers, potentially stealing session tokens or performing actions as those users.
Potential impact on your site
04Site Impact
Any authenticated user can compromise admin accounts or other users' sessions through script injection, risking site takeover.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege WordPress account (e.g., subscriber or contributor role). No user interaction required.
Key dates
06Disclosure timeline
May 21, 2025
CVE published
April 8, 2026
Record updated
