The Beaver Builder Page Builder plugin for WordPress suffers from a stored XSS vulnerability (CWE-79) due to improper neutralization of input in the custom JavaScript row settings. Authenticated users with Contributor or higher privileges can inject arbitrary JavaScript code that is stored and executed in the context of any user viewing the affected page. This vulnerability affects all versions up to and including 2.8.4.4. The CVSS 3.1 base score is 6.4, reflecting network attack vector, low attack complexity, low privileges required, no user interaction, and impacts on confidentiality and integrity with no availability impact. No known exploits in the wild have been reported, and no patch or remediation details are currently available.

An attacker with Contributor-level or higher access can inject persistent malicious scripts into pages via the custom JavaScript row settings. These scripts execute in the browsers of users who visit the injected pages, potentially leading to unauthorized actions or data disclosure limited to the confidentiality and integrity impact scope. There is no reported impact on availability. The vulnerability could be leveraged to compromise user sessions or perform actions on behalf of users viewing the affected content.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict Contributor-level access to trusted users only and consider disabling or limiting the use of custom JavaScript row settings in Beaver Builder. Monitor for updates from the vendor regarding patches or official mitigations.