MC4WP: Mailchimp for WordPress 4.9.9 - 4.9.16 - Reflected Cross-Site Scripting

6.1
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE CVE-2024-8850
CVSS 6.1 (Medium)
Publicly Published September 18, 2024
Last Updated September 25, 2024
Researcher kauenavarro

Description

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.

Learn more about Cross-Site Scripting vulnerabilities and how to prevent them.

References

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Vulnerability Details for MC4WP: Mailchimp for WordPress

Software Type Plugin
Software Slug mailchimp-for-wp (view on wordpress.org)
Patched? Yes
Remediation Update to version 4.9.17, or a newer patched version
Affected Version
  • 4.9.9 - 4.9.16
Patched Version
  • 4.9.17

Recent vulnerabilities in MC4WP: Mailchimp for WordPress

# Title CVE ID CVSS Researchers Date
1 MC4WP: Mailchimp for WordPress <= 4.11.1 - Missing Authorization to Unauthenticated Arbitrary Subscription Deletion CVE-2026-1781 6.5 Sarawut Poolkhet (MisterHelloz) March 10, 2026
2 MailChimp for Wordpress <= 4.9.16 - Authenticated (Administrator+) Stored Cross-Site Scripting CVE-2024-8680 4.4 Jorge Diaz (ddiax) September 20, 2024
3 MC4WP <= 4.9.9 - Missing Authorization via listen CVE-2023-51682 5.3 Rafie Muhammad December 27, 2023
4 MC4WP: Mailchimp for WordPress <= 4.8.6 - Authenticated (Admin+) Stored Cross-Site Scripting CVE-2021-36833 5.5 Asif Nawaz Minhas March 2, 2022
5 MC4WP: Mailchimp for WordPress < 4.8.7 - Cross-Site Scripting 5.5 March 2, 2022
6 MC4WP: Mailchimp for WordPress <= 4.8.4 - Cross-Site Request Forgery 8.8 WPScanTeam June 1, 2021
7 MC4WP: Mailchimp for WordPress <= 4.8.4 - Open Redirect 6.1 WPScanTeam June 1, 2021
8 MC4WP: Mailchimp for WordPress <= 4.1.6 - Reflected Cross-Site Scripting 6.1 RIPS Technologies November 9, 2019
9 Mailchimp For WP <= 4.1.7 - Cross-Site Scripting CVE-2017-18577 6.1 September 8, 2017
10 MailChimp for WordPress <= 4.0.10 - Reflected Cross-Site Scripting CVE-2016-10871 6.1 December 13, 2016

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