CVE-2002-0006: Xchat

High severity, CVSS 7.5. EPSS: 8.1% chance of exploitation in the next 30 days.

XChat 1.8.7 and earlier, including default configurations of 1.4.2 and 1.4.3, allows remote attackers to execute arbitrary IRC commands as other clients via encoded characters in a PRIVMSG command that calls CTCP PING, which expands the characters in the client response when the percascii variable is set.

Affected products

• Xchat Xchat: version 1.4.2 only; version 1.4.3 only

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