Clearswift MIMEsweeper for Web Arbitrary File Access
Remote / Network Access
Loss of Confidentiality
Clearswift MIMESweeper for web contains a flaw that allows a remote attacker to read files outside of the web path. The issue is due to the program not properly sanitizing user input, specifically traversal style attacks (../../) supplied via a standard http GET request.
Upgrade to version 5.0.4 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.