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, user-supplied attributes in shortcodes are not properly sanitized or escaped, allowing authenticated users with contributor or higher privileges to inject arbitrary JavaScript code. This code executes in the context of any user who accesses the compromised page, potentially leading to session hijacking or other script-based attacks. The vulnerability affects all versions up to and including 4.8.0. The CVSS 3.1 base score is 6.4, reflecting network attack vector, low attack complexity, required privileges at the contributor level, no user interaction, and partial impact on confidentiality and integrity.

An attacker with contributor-level or higher permissions can inject persistent malicious scripts into pages via shortcode attributes. These scripts execute in the browsers of users who view the infected pages, potentially exposing sensitive information or enabling unauthorized actions within the context of the affected site. The vulnerability does not impact availability. No known exploits have been reported in the wild.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict contributor-level permissions to trusted users only and consider disabling or limiting use of the Bold Page Builder plugin shortcodes. Monitor official vendor channels for updates and apply patches promptly once released.