The eping_validaddr function in functions.php for the ePing plugin for e107 portal allows remote attackers to execute arbitrary commands via shell metacharacters after a valid argument to the eping_host parameter.
Exploitability
AV:NAC:LAu:NImpact
C:PI:PA:P7.5/AV:N/AC:L/Au:N/C:P/I:P/A:P