CVE-2026-27536

WordPress MailChimp Subscribe Forms plugin <= 4.3.3 - Cross Site Scripting (XSS) vulnerability

Published Aug 13, 2026 CVSS 3.1 · 7.1 High EPSS < 1% KEV · Not listed
Description
Unauthenticated Cross Site Scripting (XSS) in MailChimp Subscribe Forms <= 4.3.3 versions.

Remediation

Vendor Solution

Update the WordPress MailChimp Subscribe Forms plugin to the latest available version (at least 4.3.4).

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

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

Type Values Removed Values Added
First Time appeared Pluginops
Pluginops mailchimp Subscribe Form
Wordpress
Wordpress wordpress
Vendors & Products Pluginops
Pluginops mailchimp Subscribe Form
Wordpress
Wordpress wordpress
Type Values Removed Values Added
Description Unauthenticated Cross Site Scripting (XSS) in MailChimp Subscribe Forms <= 4.3.3 versions.
Title WordPress MailChimp Subscribe Forms plugin <= 4.3.3 - Cross Site Scripting (XSS) vulnerability
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Patchstack
Published
Updated
Aug 13, 2026, 3:14 PM
Reserved
Feb 20, 2026, 11:18 AM
Status
Deferred
Published
Aug 13, 2026, 2:16 PM
Modified
Oct 23, 2026, 6:10 PM