CVE-2024-8850: medium-severity vulnerability in dvankooten MC4WP: Mailchimp for WordPress
MC4WP: Mailchimp for WordPress 4.9.9 - 4.9.16 - Reflected Cross-Site Scripting
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.1epss 0.5%
The MC4WP: Mailchimp for WordPress plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'email' parameter when a placeholder such as {email} is used for the field in versions 4.9.9 to 4.9.16 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Affected products
dvankooten · MC4WP: Mailchimp for WordPressRelated CVEs — dvankooten MC4WP: Mailchimp for WordPress
In the same product, most dangerous first.
CVE-2024-8680MEDIUMMailChimp for Wordpress <= 4.9.16 - Authenticated (Administrator+) Stored Cross-Site ScriptingEPSS 0.5%CVE-2026-87917MEDIUMMC4WP: Mailchimp for WordPress <= 4.14.0 - Reflected Cross-Site Scripting via 'data' Dynamic Content TagEPSS 0.4%CVE-2026-4561MEDIUMMC4WP: Mailchimp for WordPress <= 4.12.0 - Authenticated (Author+) Stored Cross-Site Scripting via Form Response MessagesEPSS 0.3%CVE-2026-1781MEDIUMMC4WP: Mailchimp for WordPress <= 4.11.1 - Missing Authorization to Unauthenticated Arbitrary Subscription DeletionEPSS 0.3%
References
https://plugins.trac.wordpress.org/browser/mailchimp-for-wp/tags/4.9.16/config/default-form-content.php#L8https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3153075%40mailchimp-for-wp&new=3153075%40mailchimp-for-wp&sfp_email=&sfph_mail=https://www.wordfence.com/threat-intel/vulnerabilities/id/1d2ba8ea-a75f-4069-b67d-f832acb1deef?source=cve