IPFilter 3.1.1 through 3.4.28 allows remote attackers to bypass firewall rules by sending a PASV command string as the argument of another command to an FTP server, which generates a response that contains the string, causing IPFilter to treat the response as if it were a legitimate PASV command from the server.
AV:N/AC:L/Au:N/C:P/I:P/A:P
This vulnerability has a 2.01% probability of being exploited in the next 30 days, ranking higher than 80% of all scored CVEs.