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.
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Sat, 19 Sep 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Sat, 19 Sep 2026 08:00:00 +0000

Type Values Removed Values Added
Description 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.
Title MC4WP: Mailchimp for WordPress <= 4.14.0 - Reflected Cross-Site Scripting via 'data' Dynamic Content Tag
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}


Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: Wordfence

Published:

Updated: 2026-09-19T13:51:20.441Z

Reserved: 2026-09-09T15:56:01.475Z

Link: CVE-2026-87917

cve-icon Vulnrichment

Updated: 2026-09-19T13:50:28.679Z

cve-icon NVD

Status : Received

Published: 2026-09-19T08:16:54.917

Modified: 2026-09-19T14:17:02.057

Link: CVE-2026-87917

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses