CVE-2023-50889: 
WordPress vulnerability analysis and mitigation

A Stored Cross-Site Scripting (XSS) vulnerability was discovered in The Beaver Builder Team's Beaver Builder – WordPress Page Builder plugin, identified as CVE-2023-50889. The vulnerability affects versions up to 2.7.2 of the plugin and was publicly disclosed on December 26, 2023. The security issue was discovered by researcher Rafie Muhammad and allows contributors and users with higher privileges to perform stored XSS attacks (Patchstack, WPScan).

The vulnerability stems from improper neutralization of input during web page generation, classified as CWE-79. The issue occurs because the plugin does not properly sanitize and escape certain settings available to users with Contributor role and above. The vulnerability has received multiple CVSS scores: a CVSS v3.1 base score of 5.4 (Medium) from NVD with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N, and a score of 6.5 (Medium) from Patchstack with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L (NVD).

If exploited, this vulnerability could allow malicious actors 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).

The vulnerability has been fixed in version 2.7.2.1 of the Beaver Builder plugin. Website administrators are advised to update to version 2.7.2.1 or later to remove the vulnerability. Patchstack users have the option to enable auto-updates for vulnerable plugins (Patchstack).