The Beaver Builder Page Builder – Drag and Drop Website Builder plugin for WordPress contains a stored cross-site scripting vulnerability identified as CVE-2026-17090. This vulnerability exists in the Button Module's 'button' setting due to improper neutralization of input during web page generation (CWE-79). Authenticated attackers with author-level or higher privileges can inject arbitrary web scripts that execute when users access the affected pages. The vulnerability affects all plugin versions up to and including 2.10.2.2. The CVSS v3.1 base score is 6.4, indicating a medium severity with network attack vector, low attack complexity, and privileges required at the level of an author. There is no official patch or remediation level stated in the available data, and no known exploits in the wild have been reported.

An authenticated user with author-level or higher privileges can exploit this vulnerability to inject malicious scripts into pages via the Button Module. These scripts execute in the context of users viewing the compromised pages, potentially leading to session hijacking, privilege escalation, or other client-side attacks. The impact is limited to users who have access to the injected pages, and the attacker must have at least author-level access to the WordPress site.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict author-level user privileges where possible and monitor for suspicious activity related to page content modifications. Avoid granting edit_posts capability to untrusted users. Follow vendor updates closely for any released patches or official mitigations.