CVE-2025-57903: 
WordPress vulnerability analysis and mitigation

A Stored Cross-Site Scripting (XSS) vulnerability has been identified in WPSuperiors Developer WooCommerce Additional Fees On Checkout (Free) plugin through version 1.5.0. The vulnerability was discovered on September 22, 2025, and was assigned identifier CVE-2025-57903. This security issue affects the WordPress plugin's web page generation functionality due to improper neutralization of input (NVD, Patchstack).

The vulnerability is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation). It has received a CVSS v3.1 Base Score of 5.9 (Medium) with the following vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L. This indicates that the vulnerability requires high privileges and user interaction to exploit, but can potentially affect confidentiality, integrity, and availability of the system (NVD).

If exploited, this vulnerability could allow a malicious actor to inject malicious scripts, including redirects, advertisements, and other HTML payloads into the website. These injected scripts would be executed when guests visit the affected site (Patchstack).

Currently, there is no official fix available for this vulnerability. The issue affects versions through 1.5.0 of the WooCommerce Additional Fees On Checkout (Free) plugin (Patchstack).