CVE-2010-0420: Pidgin

Medium severity, CVSS 4.3. EPSS: 2.9% chance of exploitation in the next 30 days.

libpurple in Finch in Pidgin before 2.6.6, when an XMPP multi-user chat (MUC) room is used, does not properly parse nicknames containing <br> sequences, which allows remote attackers to cause a denial of service (application crash) via a crafted nickname.

Affected products

• Pidgin Pidgin: up to and including 2.6.5; version 2.0.0 only; version 2.0.1 only; version 2.0.2 only; version 2.1.0 only; version 2.1.1 only; …

Published 2010-02-24. Last modified 2026-06-16.