FileUploadsFilter.php in X2Engine 4.1.7 and earlier, when running on case-insensitive file systems, allows remote attackers to bypass the upload blacklist and conduct unrestricted file upload attacks by uploading a file with an executable extension that contains uppercase letters, as demonstrated using a PHP program.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-5298
Reference (s):
- BUGTRAQ:20140923 [KIS-2014-10] X2Engine <= 4.1.7 (FileUploadsFilter.php) Unrestricted File Upload Vulnerability
- URL: http://www.securityfocus.com/archive/1/533514/100/0/threaded
- https://cert-portal.siemens.com/productcert/pdf/ssa-234763.pdf
- https://github.com/X2Engine/X2Engine/blob/master/CHANGELOG.md
- FULLDISC:20140923 [KIS-2014-10] X2Engine <= 4.1.7 (FileUploadsFilter.php) Unrestricted File Upload Vulnerability