CVE-2023-0148: 
WordPress vulnerability analysis and mitigation

The Gallery Factory Lite WordPress plugin through version 2.0.0 contains a stored Cross-Site Scripting (XSS) vulnerability identified as CVE-2023-0148. The vulnerability was discovered and publicly disclosed on January 11, 2023. The issue affects the plugin's shortcode functionality, specifically impacting installations up to version 2.0.0 (WPScan).

The vulnerability stems from improper validation and escaping of shortcode attributes before they are output back in pages or posts where the shortcode is embedded. The vulnerability has been assigned a CVSS 3.1 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, low attack complexity, and required user interaction (NVD).

The vulnerability allows users with contributor-level privileges or higher to perform Stored Cross-Site Scripting attacks. This could potentially lead to the execution of malicious JavaScript code in users' browsers when viewing affected pages (WPScan).

A proof of concept exists demonstrating the vulnerability exploitation. The attack requires first adding an Album and then using a specially crafted shortcode with malicious JavaScript in the header_class attribute: [vls_gf_viewer id='1' header_class='" onmouseover="alert(1)" style="background:red;"'] (WPScan).