Description
WordPress Plugin NextGEN Gallery-WordPress Gallery is prone to a directory traversal vulnerability because it fails to sufficiently verify user-supplied input. Exploiting this issue can allow an attacker to obtain sensitive information that could aid in further attacks. WordPress Plugin NextGEN Gallery-WordPress Gallery version 2.1.9 is vulnerable; prior versions may also be affected.
Remediation
Edit the source code to ensure that input is properly verified or disable the plugin until a fix is available
References
http://www.openwall.com/lists/oss-security/2015/09/01/7
https://www.youtube.com/watch?v=KkPVMxubUis