Directory traversal vulnerability in session.rb in Hiki 0.8.0 through 0.8.6 allows remote attackers to delete arbitrary files via directory traversal sequences in the session ID, which is matched against an insufficiently restrictive regular expression before it is used to construct a filename that is marked for deletion at logout.

Directory traversal vulnerability in session.rb in Hiki 0.8.0 through 0.8.6 allows remote attackers to delete arbitrary files via directory traversal sequences in the session ID, which is matched against an insufficiently restrictive regular expression before it is used to construct a filename that is marked for deletion at logout.

Hiki, a Wiki clone software developed by Hiki Development Team, contains a vulnerability that allows a remote attacker to delete arbitrary files. Hiki contains a vulnerability that allows an arbitrary file to be deleted on a server running Hiki. This is caused by the improper handling of a session management file.