CVE-2021-25065: 
WordPress vulnerability analysis and mitigation

The vulnerability CVE-2021-25065 affects the Smash Balloon Social Post Feed WordPress plugin versions before 4.1.1. The vulnerability was discovered by Krzysztof Zając and was publicly disclosed on December 16, 2021. It specifically impacts the custom-facebook-feed functionality in the cff-top admin page (WPScan).

This vulnerability is classified as a Reflected Cross-Site Scripting (XSS) issue, identified as CWE-79 (Improper Neutralization of Input During Web Page Generation). The vulnerability has received a CVSS v3.1 base score of 5.4 (MEDIUM) with the vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N, indicating network accessibility with low attack complexity and requiring user interaction (NVD).

The vulnerability allows for reflected cross-site scripting attacks in the admin interface of the WordPress plugin. When successfully exploited, it could enable attackers to execute malicious scripts in the context of the admin page, potentially leading to unauthorized access to sensitive information or manipulation of admin functionality (WPScan).

The vulnerability has been fixed in version 4.1.1 of the Smash Balloon Social Post Feed WordPress plugin. Users are advised to update to this version or later to mitigate the security risk (WPScan).