The Colibri Page Builder plugin for WordPress suffers from a stored cross-site scripting vulnerability (CWE-79) via the colibri_blog_posts shortcode. This occurs due to improper neutralization of user-supplied input attributes, enabling authenticated users with contributor or higher privileges to inject arbitrary JavaScript code into pages. When other users access these pages, the injected scripts execute in their browsers. The vulnerability affects all versions up to 1.0.345 and has a CVSS score of 6.4, reflecting a medium severity level. No patch or remediation details are currently provided by the vendor or other authoritative sources.

An attacker with contributor-level or higher access can inject persistent malicious scripts into pages via the vulnerable shortcode. This can lead to the execution of arbitrary scripts in the context of users viewing the compromised pages, potentially resulting in data theft, session hijacking, or other client-side attacks. The vulnerability does not impact availability and requires authenticated access, limiting the attack surface. There are no known exploits in the wild at this time.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict contributor-level access to trusted users only and consider disabling or removing the Colibri Page Builder plugin if feasible. Monitor the vendor's communications for updates on patches or official mitigations.