MC4WP: Mailchimp for WordPress <= 4.8.4 - Open Redirect

6.1
URL Redirection to Untrusted Site ('Open Redirect')
CVSS 6.1 (Medium)
Publicly Published June 1, 2021
Last Updated January 22, 2024
Researcher WPScanTeam - WPScan

Description

The MC4WP: Mailchimp for WordPress for WordPress is vulnerable to Open Redirection via the '_redirect_to ' parameter in versions up to, and including, 4.8.4. This makes it possible for unauthenticated attackers to arbitrarily redirect administrators via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

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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 4.8.5, or a newer patched version
Affected Version
  • <= 4.8.4
Patched Version
  • 4.8.5

Recent vulnerabilities in MC4WP: Mailchimp for WordPress

# Title CVE ID CVSS Researchers Date
1 MC4WP: Mailchimp for WordPress <= 4.12.0 - Authenticated (Author+) Stored Cross-Site Scripting via Form Response Messages CVE-2026-4561 6.4 Osvaldo Noe Gonzalez Del Rio (Os) August 21, 2026
2 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
3 MailChimp for Wordpress <= 4.9.16 - Authenticated (Administrator+) Stored Cross-Site Scripting CVE-2024-8680 4.4 Jorge Diaz (ddiax) September 20, 2024
4 MC4WP: Mailchimp for WordPress 4.9.9 - 4.9.16 - Reflected Cross-Site Scripting CVE-2024-8850 6.1 kauenavarro September 18, 2024
5 MC4WP <= 4.9.9 - Missing Authorization via listen CVE-2023-51682 5.3 Rafie Muhammad December 27, 2023
6 MC4WP: Mailchimp for WordPress <= 4.8.6 - Authenticated (Admin+) Stored Cross-Site Scripting CVE-2021-36833 5.5 Asif Nawaz Minhas March 2, 2022
7 MC4WP: Mailchimp for WordPress < 4.8.7 - Cross-Site Scripting 5.5 March 2, 2022
8 MC4WP: Mailchimp for WordPress <= 4.8.4 - Cross-Site Request Forgery 8.8 WPScanTeam June 1, 2021
9 MC4WP: Mailchimp for WordPress <= 4.1.6 - Reflected Cross-Site Scripting 6.1 RIPS Technologies November 9, 2019
10 Mailchimp For WP <= 4.1.7 - Cross-Site Scripting CVE-2017-18577 6.1 September 8, 2017

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