Access Control Gaps in ibericode MC4WP Mailchimp for WordPress
CVE-2026-27356

5.3MEDIUM

Key Information:

Vendor

WordPress
Status
Mc4WP
Vendor
CVE Published:
6 November 2026

What is CVE-2026-27356?

The ibericode MC4WP Mailchimp for WordPress plugin exhibits a missing authorization vulnerability that could potentially allow unauthorized users to exploit improperly configured access control settings. This vulnerability affects all versions up to and including 4.14.1, enabling attackers to gain access to restricted areas of the plugin and compromising site security. It is essential for users to assess their configurations and update to secure versions to mitigate this risk.

Affected Version(s)

MC4WP 0 <= 4.14.1

References

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

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Harry Nguyen | Patchstack Bug Bounty Program
.