CVE-2026-57813: Properfraction Mailoptin

Critical severity, CVSS 9.8. EPSS: 0.5% chance of exploitation in the next 30 days.

Incorrect Privilege Assignment vulnerability in properfraction MailOptin mailoptin allows Privilege Escalation.This issue affects MailOptin: from n/a through <= 1.2.77.3.

Affected products

• Properfraction Mailoptin: up to and including 1.2.77.3

Published 2026-07-13. Last modified 2026-07-13.