What the vulnerability does
01Description
The Advanced iFrame plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'advanced_iframe' shortcode in all versions up to, and including, 2025.5 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
Advanced iFrame contains a cross-site scripting (XSS) vulnerability that allows authenticated users to inject malicious scripts affecting other users on the site. An attacker with low-level access can craft a malicious iframe configuration that executes JavaScript in the browsers of other site visitors. The vulnerability has scope impact, meaning the attack can affect components beyond the plugin itself.
What an attacker can do
03Attacker Capabilities
Inject JavaScript code that runs in other users' browsers when they view pages with the affected iframe.
Potential impact on your site
04Site Impact
Authenticated users with low privileges can compromise other users' sessions, steal data, or deface site content.
Conditions required to exploit
05Prerequisites
Attacker must have a low-level authenticated account on the site; no user interaction required.
Key dates
06Disclosure timeline
July 26, 2025
CVE published
April 8, 2026
Record updated
