CVE-2023-28862: Lemonldap-NG Lemonldap::ng

Critical severity, CVSS 9.8. EPSS: 1% chance of exploitation in the next 30 days.

An issue was discovered in LemonLDAP::NG before 2.16.1. Weak session ID generation in the AuthBasic handler and incorrect failure handling during a password check allow attackers to bypass 2FA verification. Any plugin that tries to deny session creation after the store step does not deny an AuthBasic session.

Affected products

• Lemonldap-NG Lemonldap::ng: before 2.16.1 (fixed in 2.16.1)

Published 2023-03-31. Last modified 2026-06-17.