A command injection vulnerability exists in GestioIP 3.0 commit ac67be and earlier in ip_checkhost.cgi. Crafted input to the 'ip' parameter allows attackers to execute arbitrary shell commands on the server via embedded base64-encoded payloads. Authentication may be required depending on deployment configuration.
The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.