Missing Authorization Vulnerability in WP Mailster by WordPress
CVE-2026-105055

5.3MEDIUM

Key Information:

Vendor

WordPress
Status
WP Mailster
Vendor
CVE Published:
5 October 2026

What is CVE-2026-105055?

The WP Mailster plugin for WordPress suffers from a missing authorization vulnerability, allowing unauthorized users to exploit misconfigured access controls. This issue impacts versions from n/a to 1.9.0.0, posing a significant risk to users' data integrity and privacy. It is crucial for users of the affected versions to apply patches and review their security configurations to prevent exploitation.

Affected Version(s)

WP Mailster 0 <= 1.9.0.0

References

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

CVSS V3.1

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

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Ratchanon Chamnankit | Patchstack Bug Bounty Program
.