CVE-2023-28533: 
WordPress vulnerability analysis and mitigation

A Stored Cross-Site Scripting (XSS) vulnerability was discovered in the M Williams Cab Grid WordPress plugin versions 1.5.15 and below. The vulnerability was identified on April 21, 2023, by security researcher Yuki Haruma and was assigned CVE-2023-28533. This security issue affects users with administrator privileges and above in WordPress installations (Patchstack, WPScan).

The vulnerability stems from the plugin's failure to properly validate and escape certain parameters, which could enable users with administrative privileges to perform Stored Cross-Site Scripting attacks, even in scenarios where the unfiltered_html capability is disabled, such as in multisite setups. The vulnerability has been assigned a CVSS v3.1 base score of 4.8 (MEDIUM) by NIST with a vector string of CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N, while Patchstack assessed it with a score of 5.9 (MEDIUM) (Patchstack).

The vulnerability could allow malicious actors to inject malicious scripts, including redirects, advertisements, and other HTML payloads into the website, which would be executed when visitors access the site. However, due to the requirement of administrative privileges, the overall severity impact is considered low (Patchstack).

The vulnerability has been fixed in version 1.6 of the Cab Grid plugin. Site administrators are advised to update to version 1.6 or later to remove the vulnerability. Patchstack users can enable auto-update functionality for vulnerable plugins (Patchstack).