Baltimore Technologies Websweeper 4.02

Baltimore Technologies WEBsweeper 4.02, when used to manage URL blacklists, allows remote attackers to bypass blacklist restrictions and connect to unauthorized web servers by modifying the requested URL, including (1) a // (double slash), (2) a /SUBDIR/.. where the desired file is in the parentdir, (3) a /./, or (4) URL-encoded characters.

Baltimore Technologies WEBsweeper 4.0 and 4.02 does not properly filter Javascript from HTML pages, which could allow remote attackers to bypass the filtering via (1) an extra leading < and one or more characters before the SCRIPT tag, or (2) tags using Unicode.