What the vulnerability does
01Description
The Image Source Control Lite – Show Image Credits and Captions plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'Image Source' attachment field in all versions up to, and including, 3.9.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Author-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
Image Source Control Lite contains a cross-site scripting (XSS) vulnerability in versions up to 3.9.1. An authenticated user with low privileges can inject malicious scripts that execute in other users' browsers, potentially affecting site visitors and administrators. The vulnerability has scope change, meaning the impact extends beyond the plugin itself to the broader WordPress environment.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that run in other users' browsers, stealing session tokens or performing actions on their behalf.
Potential impact on your site
04Site Impact
Authenticated attackers can compromise admin sessions, deface content, or steal visitor data without requiring user interaction.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege WordPress account (e.g., contributor or subscriber role).
Key dates
06Disclosure timeline
April 20, 2026
CVE published
April 21, 2026
Record updated
