The Bold Page Builder plugin for WordPress suffers from a stored XSS vulnerability (CWE-79) due to improper neutralization of input during web page generation. Specifically, the URL attribute of widgets does not undergo adequate input sanitization or output escaping, enabling authenticated users with contributor or higher privileges to inject arbitrary JavaScript code. This code executes in the context of any user accessing the compromised page, potentially leading to session hijacking or other client-side attacks. The vulnerability affects all versions up to and including 4.8.8. No known exploits in the wild have been reported, and no patch or official fix details are currently available.

An attacker with contributor-level or higher access can inject persistent malicious scripts into pages via widget URL attributes. These scripts execute in the browsers of users who visit the infected pages, potentially compromising user sessions or performing unauthorized actions within the context of the affected site. The vulnerability does not impact availability but can lead to confidentiality and integrity loss of user data. The CVSS score of 6.4 reflects a medium severity with network attack vector, low attack complexity, and no user interaction required.

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 the affected widget URL attribute. Monitor for plugin updates from boldthemes and apply them promptly once released.