CVE-2025-4392: Anssilaitila Shared Files – Frontend File Upload Form & Secure File Sharing

High severity, CVSS 7.2. EPSS: 0.4% chance of exploitation in the next 30 days.

The Shared Files – Frontend File Upload Form & Secure File Sharing plugin for WordPress is vulnerable to Stored Cross-Site Scripting via html File uploads in all versions up to, and including, 1.7.48 due to insufficient input sanitization and output escaping within the sanitize_file() function. This makes it possible for unauthenticated attackers to bypass the plugin’s MIME-only checks and inject arbitrary web scripts in pages that will execute whenever a user accesses the html file.

Affected products

• Anssilaitila Shared Files – Frontend File Upload Form & Secure File Sharing: up to and including 1.7.48

Published 2025-06-03. Last modified 2026-06-17.