schema.py in FormEncode for Python (python-formencode) 1.0 does not apply the chained_validators feature, which allows attackers to bypass intended access restrictions via unknown vectors.
osvdb.org/47082
secunia.com/advisories/31081
secunia.com/advisories/31163
sourceforge.net/tracker/download.php?group_id=91231&atid=596416&file_id=271779&aid=1925164
sourceforge.net/tracker/index.php?func=detail&aid=1925164&group_id=91231&atid=596416
www.securityfocus.com/bid/30282
exchange.xforce.ibmcloud.com/vulnerabilities/43878
www.redhat.com/archives/fedora-package-announce/2008-July/msg00607.html