Privilege Escalation in MailOptin by ProperFraction
CVE-2026-57813

9.8CRITICAL

Key Information:

Vendor

WordPress
Status
Mailoptin
Vendor
CVE Published:
13 July 2026

What is CVE-2026-57813?

The MailOptin plugin by ProperFraction is susceptible to an incorrect privilege assignment, which opens doors for privilege escalation. This vulnerability allows users to gain elevated permissions within the application. Affected versions include all prior to and including 1.2.77.3. It is vital for users of this plugin to update to the latest version to mitigate any risks associated with unauthorized access.

Affected Version(s)

MailOptin 0 <= 1.2.77.3

References

https://patchstack.com/database/Wordpress/Plugin/mailopti...
vdb-entry

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

qdtad | Patchstack Bug Bounty Program
.