Cross-Site Scripting Vulnerability in WP Mailster Plugin for WordPress
CVE-2026-111830

7.1HIGH

Key Information:

Vendor

WordPress
Status
WP Mailster
Vendor
CVE Published:
22 October 2026

What is CVE-2026-111830?

A Cross-Site Scripting (XSS) vulnerability exists in the WP Mailster plugin, allowing attackers to inject malicious scripts that execute upon accessing affected pages. This security flaw impacts versions of the plugin from its initial release through 1.9.1.0, enabling unauthorized users to exploit the vulnerability for stored XSS attacks, which can lead to session hijacking and data theft.

Affected Version(s)

WP Mailster 0 <= 1.9.1.0

References

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

V1T | Patchstack Bug Bounty Program
.