CVE-2002-0197: Psychoid Psybnc

High severity, CVSS 7.5. EPSS: 2.5% chance of exploitation in the next 30 days.

psyBNC 2.3 beta and earlier allows remote attackers to spoof encrypted, trusted messages by sending lines that begin with the "[B]" sequence, which makes the message appear legitimate.

Affected products

• Psychoid Psybnc: up to and including 2.3

Published 2002-05-16. Last modified 2026-06-16.