Executive brief
Regular Labs produces popular Joomla extensions (Articles Anywhere and Users Anywhere) used by over 100,000 websites to manage content display. These extensions fail to properly sanitize visitor-supplied input before inserting it into HTML, allowing attackers to inject malicious scripts or modify page functionality. An attacker could trick a visitor into clicking a malicious link to steal credentials or take control of their session.
Technical details
This is a reflected cross-site scripting (XSS) vulnerability in the Articles Anywhere and Users Anywhere Joomla extensions. The root cause is that these extensions return request-input data values without context-aware sanitization—Joomla's string filter does not provide the same safety for HTML text, HTML attributes, and URLs. An attacker can craft a malicious URL containing executable script or event attributes that execute in a victim's browser when the extension processes the unsanitized request parameter. The vulnerability is reflected (not stored), so exploitation requires social engineering or URL injection. No special authentication is required.
Affected products
- Regular Labs Articles Anywhere < 20.0.0
- Regular Labs Users Anywhere < 2.1.0
Timeline
- 2026-09-14: disclosed