CVE-2002-0321: Yahoo Messenger

Medium severity, CVSS 5.0. EPSS: 3.3% chance of exploitation in the next 30 days.

Yahoo! Messenger 5.0 allows remote attackers to spoof other users by modifying the username and using the spoofed username for social engineering or denial of service (flooding) attacks.

Affected products

• Yahoo Messenger: version 5.0 only

Published 2002-06-25. Last modified 2026-06-16.