ntopng through 6.6 is vulnerable to Predictable Session Identifier which can lead to Session Hijacking. HTTP session identifiers in src/HTTPserver.cpp use weak time-seeded pseudo-randomness during session creation. As a result, fresh authenticated logins can receive deterministic or colliding session cookies under attacker-controlled timing.

CWE-601 URL redirection to untrusted site ('open redirect')

The NetworkInterface::getHost function in NetworkInterface.cpp in ntopng before 3.0 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via an empty field that should have contained a hostname or IP address.

ntopng before 3.0 allows XSS because GET and POST parameters are improperly validated.

ntopng before 3.0 allows HTTP Response Splitting.

Cross-site request forgery (CSRF) vulnerability in ntopng through 2.4 allows remote attackers to hijack the authentication of arbitrary users, as demonstrated by admin/adduser.lua, admin/changeuserprefs.lua, admin/deleteuser.lua, and admin/passwordreset.lua.

Cross-site scripting (XSS) vulnerability in the nDPI traffic classification library in ntopng (aka ntop) before 1.2.1 allows remote attackers to inject arbitrary web script or HTML via the HTTP Host header.

Cross-site scripting (XSS) vulnerability in lua/hostdetails.lua in ntopng 1.1 allows remote attackers to inject arbitrary web script or HTML via the host parameter.