CVE-2024-13589 is a stored cross-site scripting vulnerability in the YouTube Playlists with Schema WordPress plugin by johnnya23. The issue exists in the 'yt_grid' shortcode due to improper input sanitization and output escaping of user-supplied attributes. Authenticated users with contributor or higher privileges can inject arbitrary web scripts into pages, which execute upon page access. The vulnerability affects all versions up to and including 2.6.1. 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 impacts on confidentiality and integrity but not availability. There is no vendor advisory or patch information provided, and no known exploits have been reported.

An attacker with contributor-level access or higher can exploit this vulnerability to inject malicious scripts that execute in the context of users viewing the affected pages. This can lead to unauthorized actions such as session hijacking or defacement, impacting confidentiality and integrity of user data. Availability is not affected. Since the vulnerability requires authenticated access at contributor level, the attack surface is limited to users with such privileges.

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 YouTube Playlists with Schema plugin if possible. Monitor for updates from the plugin author or WordPress security channels for a patch or official mitigation instructions.