Stored Cross-Site Scripting Vulnerability in MC4WP Affects Multi-Site Installations

CVE-2024-8680

Summary

The Mailchimp for WordPress plugin for WordPress exhibits a vulnerability that permits stored cross-site scripting through its admin settings. This issue arises from inadequate input validation and output escaping practices. Authenticated users with administrator-level permissions can exploit this vulnerability to insert arbitrary web scripts that are executed whenever a user accesses the compromised page. It is particularly relevant in multi-site environments and instances where the unfiltered_html capability has been disabled, thereby increasing the risk of malicious script execution on affected installations.

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