CVE-2021-3005: Mk-Auth

Medium severity, CVSS 4.3. EPSS: 0.9% chance of exploitation in the next 30 days.

MK-AUTH through 19.01 K4.9 allows remote attackers to obtain sensitive information (e.g., a CPF number) via a modified titulo (aka invoice number) value to the central/recibo.php URI.

Affected products

• Mk-Auth Mk-Auth: up to and including 19.01

Published 2021-01-03. Last modified 2026-06-17.