piwigo -- CSRF/Path Traversal

High-Tech Bridge Security Research Lab reports:

The CSRF vulnerability exists due to insufficient verification of the
HTTP request origin in “/admin.php” script. A remote attacker can trick
a logged-in administrator to visit a specially crafted webpage and
create arbitrary PHP file on the remote server.
The path traversal vulnerability exists due to insufficient filtration
of user-supplied input in “dl” HTTP GET parameter passed to
“/install.php” script. The script is present on the system after
installation by default, and can be accessed by attacker without any
restrictions.