What’s Vulnerable › Vulnerabilities

CVE-2025-4392: Shared Files <= 1.7.48 - Unauthenticated Stored Cross-Site Scripting via sanitize_file Function

• Severity: high (CVSS 7.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-06-03 · updated 2026-06-17
• Weakness: CWE-79

Description

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: through 1.7.48

References

• https://github.com/anssilaitila/shared-files/blob/master/admin/class-sf-admin-allow-more-file-types.php
• https://plugins.trac.wordpress.org/changeset/3304053/
• https://wordpress.org/plugins/shared-files/#developers
• https://www.wordfence.com/threat-intel/vulnerabilities/id/469a9c8a-0708-4c93-99d8-e9157a1f91f5?source=cve

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