What’s Vulnerable › Vulnerabilities

CVE-2024-8680: MailChimp for Wordpress <= 4.9.16 - Authenticated (Administrator+) Stored Cross-Site Scripting

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-09-21 · updated 2026-06-17
• Weakness: CWE-80

Description

The MC4WP: Mailchimp for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 4.9.16 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

Affected products

• dvankooten MC4WP: Mailchimp for WordPress: before 4.9.17 — fixed in 4.9.17

How to fix

Upgrade to a fixed version: dvankooten MC4WP: Mailchimp for WordPress 4.9.17. Check the vendor advisory for mitigations.

References

• https://github.com/ibericode/mailchimp-for-wordpress/blob/main/includes/views/parts/lists-overview-details.php
• https://github.com/ibericode/mailchimp-for-wordpress/commit/60c6bfc260a7974f791af1d4ad4a032a3e0bdd3c
• https://plugins.trac.wordpress.org/browser/mailchimp-for-wp/trunk/includes/views/parts/lists-overview-details.php
• https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3153075%40mailchimp-for-wp%2Ftrunk&old=3149806%40mailchimp-for-wp%2Ftrunk&sfp_email=&sfph_mail=
• https://www.wordfence.com/threat-intel/vulnerabilities/id/aa464547-0380-4b91-a5ea-0cd9a66da7a7?source=cve

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