CVE-2026-87917 MEDIUM

CVE-2026-87917: MC4WP: Mailchimp for WordPress <= 4.14.0 - Reflected Cross-Site Scripting via 'data' Dynamic Content Tag

Vendor Dvankooten
Product MC4WP: Mailchimp for WordPress
Weakness CWE-79 · XSS
Published September 19, 2026
Last update September 19, 2026
View on NVD All CVEs

CVSS base score

6.1/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

What the vulnerability does

01Description

The MC4WP: Mailchimp for WordPress plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via 'data' Dynamic Content Tag in all versions up to, and including, 4.14.0 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.

Key dates

02Disclosure timeline

September 19, 2026 CVE published
September 19, 2026 Record updated

Related vulnerabilities

04Related CVE

CVE-2026-75964 User Profile Builder <= 4.0.0 - Unauthenticated Stored Cross-Site Scripting via 'email' Parameter CVE-2026-78071 Joomla Extension - digital-peak.com - Authenticated, privileged stored XSS in DP Calendar 7.0.0 - 10.11.2 CVE-2026-82123 WordPress Loops & Logic - Reflected XSS CVE-2026-81760 WordPress JetEngine plugin <= 3.8.14.2 - Cross Site Scripting (XSS) vulnerability CVE-2026-78077 Joomla Extension - joomshaper.com - Stored Cross-Site Scripting (XSS) in MegaMenu Layout Container & Embed Inputs in Helix Ultimate < 2.2.10