What is CVE-2025-4392?

CVE-2025-4392 is a high-severity vulnerability in Anssilaitila Shared Files – Frontend File Upload Form & Secure Sharing, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2025-06-03.

How severe is CVE-2025-4392?

High severity. CVSS v3 base score is 7.2 out of 10.

XSS in Anssilaitila Shared Files – Frontend File Upload Form & Secure Sharing

CVE-2025-4392

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.003 (22.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.

Affected products

Anssilaitila Shared Files – Frontend File Upload Form & Secure Sharing — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2025-4392?: CVE-2025-4392 is a high-severity vulnerability in Anssilaitila Shared Files – Frontend File Upload Form & Secure Sharing, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2025-06-03.
How severe is CVE-2025-4392?: High severity. CVSS v3 base score is 7.2 out of 10.