YaBB 9.1.2000 - Arbitrary File Read

source: https://www.securityfocus.com/bid/1668/info YaBB.pl, a web-based bulletin board script, stores board postings in numbered text files. The numbered file name is specified in the call to YaBB.pl in the variable num=. Before retrieving the file, YaBB will append a .txt extension to . Due to...