CVE-1999-0990: Gnome Gdm

Low severity, CVSS 2.1. EPSS: 0.4% chance of exploitation in the next 30 days.

Error messages generated by gdm with the VerboseAuth setting allows an attacker to identify valid users on a system.

Affected products

• Gnome Gdm: version 2.0_beta4 only

Published 1999-12-05. Last modified 2026-06-16.