The URL handler in the manual browser option for Gaim before 0.59.1 allows remote attackers to execute arbitrary script via shell metacharacters in a link.
http://www.securityfocus.com/bid/5574
http://www.redhat.com/support/errata/RHSA-2003-156.html
http://www.redhat.com/support/errata/RHSA-2002-191.html
http://www.redhat.com/support/errata/RHSA-2002-190.html
http://www.redhat.com/support/errata/RHSA-2002-189.html
http://www.iss.net/security_center/static/9978.php
http://www.debian.org/security/2002/dsa-158
http://online.securityfocus.com/advisories/4471
http://marc.info/?l=bugtraq&m=103046442403404&w=2
http://gaim.sourceforge.net/ChangeLog
http://frontal2.mandriva.com/security/advisories?name=MDKSA-2002:054
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000521