CVE-2024-8680 is a stored cross-site scripting vulnerability (CWE-80) in the MC4WP: Mailchimp for WordPress plugin. It affects all versions up to 4.9.16 due to improper neutralization of script-related HTML tags in admin settings. Authenticated users with administrator privileges can inject arbitrary scripts that execute when other users view the affected pages. The vulnerability specifically impacts multi-site WordPress installations or those where the unfiltered_html capability is disabled, limiting the scope of exploitation. The CVSS 3.1 base score is 4.4, reflecting a medium severity with network attack vector, high attack complexity, and requiring high privileges without user interaction.

An authenticated attacker with administrator-level permissions can inject malicious scripts into admin settings, which will execute in the context of users visiting the affected pages. This can lead to limited confidentiality and integrity impacts, such as session hijacking or unauthorized actions performed on behalf of users. The vulnerability does not affect single-site installations or those with unfiltered_html enabled, reducing the overall 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 administrator access to trusted users only and consider disabling multi-site features if not required. Monitor for updates from the plugin vendor and apply patches promptly once available. Avoid disabling unfiltered_html unless necessary, as this setting affects vulnerability exposure.