Cross Site Scripting Vulnerability in MailChimp Subscribe Forms by MailChimp
CVE-2026-27536

7.1HIGH

Key Information:

Vendor

WordPress
Status
Mailchimp Subscribe Forms
Vendor
CVE Published:
13 August 2026

What is CVE-2026-27536?

An unauthenticated Cross Site Scripting (XSS) vulnerability exists in MailChimp Subscribe Forms versions up to and including 4.3.3. This issue allows attackers to inject malicious scripts into web pages viewed by other users, potentially compromising sensitive user data and leading to unauthorized access or data manipulation. Users of affected versions are encouraged to update to the latest version to mitigate the risks associated with this vulnerability.

Affected Version(s)

MailChimp Subscribe Forms <= 4.3.3

References

https://patchstack.com/database/wordpress/plugin/mailchim...
vdb-entry

CVSS V3.1

Score:
7.1
Severity:
HIGH
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

HaiND | Patchstack Bug Bounty Program
.