Cross-site Scripting Vulnerability in EverPress Mailster Email Plugin
CVE-2025-64203

7.1HIGH

Key Information:

Vendor

WordPress
Status
Mailster
Vendor
CVE Published:
18 December 2025

What is CVE-2025-64203?

A Cross-site Scripting (XSS) vulnerability in the EverPress Mailster email marketing plugin allows attackers to inject malicious scripts into web pages viewed by users. This flaw is present in Mailster versions prior to 4.1.14 and can lead to unauthorized actions performed on behalf of users, compromising their data security. Proper input sanitization measures must be implemented to prevent such exploits and ensure the integrity of the web application.

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Deploy the Patch

Affected Version(s)

Mailster <= n/a

References

https://patchstack.com/database/Wordpress/Plugin/mailster...
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

João Pedro S Alcântara (Kinorth) | Patchstack Bug Bounty Program
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