XSS Vulnerability in MIVA Merchant 5 - Includes Fix
MIVA Merchant 5 is vulnerable to XSS attack. Users can use javascript to embed
their own inputs into the MM5 screens and checkout pages overriding various
store safeguards and functions.
MIVA Corporation has been very cooperative and has already posted an update to
their software entitled (core-4). Users of MIVA Merchant 5 should login to
their admin panels and allow the update wizard to make the current updates to
(core-4). An earlier patch entitled (core-2) should be installed prior to
installing (core-4).
The update includes the sanity checking and cleanup of several key variables
and fixes other security issues found with the new templating system.
XSS Sample:
http://HOSTNAME/mm5/merchant.mvc?Screen=ACNT&Action=EMPW&Customer_Login=";><script>document.write("\n<br><input%20type=text%20name=somenewfield%20value='Hello%20World'>")</script>