Website META Language (WML) 2.0.11 allows local users to overwrite arbitrary files via a symlink attack on (1) the /tmp/pe.tmp.$$ temporary file used by wml_contrib/wmg.cgi and (2) temporary files used by wml_backend/p3_eperl/eperl_sys.c.
http://www.securityfocus.com/bid/27685
http://www.mandriva.com/security/advisories?name=MDVSA-2008:076
http://www.debian.org/security/2008/dsa-1492
http://security.gentoo.org/glsa/glsa-200803-23.xml
http://secunia.com/advisories/29353