What the vulnerability does
01Description
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Embeds For YouTube Plugin Support YouTube Embed youtube-embed allows Stored XSS.This issue affects YouTube Embed: from n/a through <= 5.4.
Explanation of Vulnerability in Simple Terms
02Summary
The YouTube Embed plugin for WordPress contains a cross-site scripting (XSS) vulnerability in versions 5.4 and earlier. An authenticated user with low privileges can inject malicious scripts that execute in other users' browsers when they view affected pages. The vulnerability requires user interaction and can affect site visitors across different security contexts.
What an attacker can do
03Attacker Capabilities
Inject malicious JavaScript that runs in other users' browsers when they view the site.
Potential impact on your site
04Site Impact
Site visitors' sessions and data could be compromised if an authenticated user injects malicious code via YouTube embeds.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege WordPress account and the victim must visit a page containing the malicious embed.
Key dates
06Disclosure timeline
December 24, 2025
CVE published
April 28, 2026
Record updated