CVE-2024-3491 is a stored cross-site scripting vulnerability in the magazine3 Schema & Structured Data for WP & AMP plugin for WordPress. It affects all versions up to and including 1.29. The vulnerability arises from improper neutralization of user-supplied input in the plugin's "How To" and "FAQ" blocks, allowing authenticated users with contributor-level privileges or higher to inject arbitrary web scripts. These scripts execute in the context of any user who accesses the injected page, potentially leading to session hijacking or other script-based attacks. The CVSS 3.1 base score is 6.4 (medium severity), with an attack vector of network, low attack complexity, privileges required at the low level, no user interaction, and partial impact on confidentiality and integrity but no impact on availability.

An attacker with contributor-level or higher access can inject persistent malicious scripts into pages via the vulnerable blocks. These scripts execute in the browsers of users who visit the compromised pages, potentially exposing sensitive information or enabling further attacks. The impact affects confidentiality and integrity but does not affect availability. 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 available, restrict contributor-level access to trusted users only and consider disabling the affected "How To" and "FAQ" blocks if possible. Monitor vendor channels for updates and apply patches promptly once released.