Adobe Document Server for Reader Extensions 6.0 allows remote authenticated users to inject arbitrary web script via a leading (1) ftp or (2) http URI in the ReaderURL variable in the "Update Download Site" section of ads-readerext. NOTE: it is not clear whether the vendor advisory addresses this issue. In addition, since the issue requires administrative privileges to exploit, it is not clear whether this crosses security boundaries.
https://exchange.xforce.ibmcloud.com/vulnerabilities/25770
http://www.vupen.com/english/advisories/2006/1342
http://www.securityfocus.com/bid/17500
http://www.securityfocus.com/archive/1/430869/100/0/threaded
http://www.adobe.com/support/techdocs/322699.html