Unauthorized Access Vulnerability in MailPress Plugin for WordPress
CVE-2026-18436

5.3MEDIUM

Key Information:

Vendor

WordPress
Status
Mailerpress – Newsletter, Email Marketing & Ai Automation
Vendor
CVE Published:
31 July 2026

What is CVE-2026-18436?

The MailPress plugin for WordPress is susceptible to unauthorized access due to a flaw in the campaign revision-restore REST endpoint. In versions up to and including 1.5.0, the endpoint was registered without a permissionCallback, allowing unauthenticated attackers to execute the restoreRevision() handler. This oversight enables unauthorized users to overwrite a campaign's content by restoring any prior revision, posing significant risks of content manipulation and misinformation.

Affected Version(s)

MailerPress – Newsletter, email marketing & AI automation 0 <= 1.5.0

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/mailerpress/tr...
https://plugins.trac.wordpress.org/browser/mailerpress/tr...

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

Jakub Lipiński (A3RES)
.