YACS contains a flaw that allows a remote cross site scripting attack. This flaw exists because the application does not validate the 'context[path_to_root]' variable upon submission to the 'categories/populate.php' script. This could allow a user to create a specially crafted URL that would execute arbitrary code in a user's browser within the trust relationship between the browser and the server, leading to a loss of integrity.
Classification
Location:
Remote / Network Access
Attack Type:
Input Manipulation
Impact:
Loss of Integrity
Exploit:
Exploit Public
Disclosure:
Vendor Verified
OSVDB:
Web Related
Solution
Upgrade to version 6.9 or higher, as it has been reported to fix this vulnerability. In addition, the vendor has released a patch for some older versions.