CVE-2023-51674: 
WordPress vulnerability analysis and mitigation

A stored Cross-Site Scripting (XSS) vulnerability was discovered in the AAM Advanced Access Manager WordPress plugin, affecting versions up to 6.9.18. The vulnerability was identified on December 27, 2023, and tracked as CVE-2023-51674. The plugin, which handles restricted content, users & roles, and enhanced security features, fails to properly validate and escape certain shortcode attributes before outputting them in pages or posts (Patchstack, WPScan).

The vulnerability is classified as an Improper Neutralization of Input During Web Page Generation (CWE-79). It received a CVSS v3.1 base score of 5.4 (Medium) from NIST and 6.5 (Medium) from Patchstack, with the vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N. The issue specifically involves shortcode attributes that are not properly validated and escaped before being output in pages where the shortcode is embedded (NVD).

The vulnerability allows users with contributor-level privileges and above to perform Stored Cross-Site Scripting attacks. This could enable malicious actors to inject harmful scripts, including redirects, advertisements, and other HTML payloads that would execute when visitors access the affected site (Patchstack).

The vulnerability has been patched in version 6.9.19 of the Advanced Access Manager plugin. Site administrators are advised to update to this version or later to remediate the security issue (Patchstack).