CVE-2026-27536

HIGH 7.1

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

CVSS Score

7.1

EPSS Score

0.0%

EPSS Percentile

0th

Unauthenticated Cross Site Scripting (XSS) in MailChimp Subscribe Forms <= 4.3.3 versions.

CWE	CWE-79
Vendor	pluginops
Product	mailchimp subscribe forms
Published	Aug 13, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

Low

Affected Versions

PluginOps / MailChimp Subscribe Forms

n/a ≤ 4.3.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

patchstack.com: https://patchstack.com/database/wordpress/plugin/mailchimp-subscribe-sm/vulnerability/wordpress-mailchimp-subscribe-forms-plugin-4-3-3-cross-site-scripting-xss-vulnerability?_s_id=cve

Credits

HaiND | Patchstack Bug Bounty Program