The output_add_rewrite_var function in PHP before 5.2.5 rewrites local forms in which the ACTION attribute references a non-local URL, which allows remote attackers to obtain potentially sensitive information by reading the requests for this URL, as demonstrated by a rewritten form containing a local session ID.
https://www.redhat.com/archives/fedora-package-announce/2008-June/msg00773.html
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11211
https://launchpad.net/bugs/173043
https://issues.rpath.com/browse/RPL-1943
http://www.ubuntu.com/usn/usn-628-1
http://www.ubuntu.com/usn/usn-549-2
http://www.securityfocus.com/archive/1/491693/100/0/threaded
http://www.redhat.com/support/errata/RHSA-2008-0582.html
http://www.redhat.com/support/errata/RHSA-2008-0546.html
http://www.redhat.com/support/errata/RHSA-2008-0545.html
http://www.redhat.com/support/errata/RHSA-2008-0544.html
http://www.redhat.com/support/errata/RHSA-2008-0505.html
http://www.php.net/releases/5_2_5.php
http://www.php.net/ChangeLog-5.php#5.2.5
http://www.mandriva.com/security/advisories?name=MDVSA-2008:127
http://www.mandriva.com/security/advisories?name=MDVSA-2008:126
http://www.mandriva.com/security/advisories?name=MDVSA-2008:125
http://www.debian.org/security/2008/dsa-1444
http://wiki.rpath.com/wiki/Advisories:rPSA-2007-0242
http://secunia.com/advisories/31200
http://secunia.com/advisories/31124
http://secunia.com/advisories/31119
http://secunia.com/advisories/30828
http://secunia.com/advisories/30040
http://secunia.com/advisories/28249
http://secunia.com/advisories/27864