Speedywiki 2.0 allows remote attackers to obtain the full path of the web server via the (1) showRevisions[] and (2) searchText[] parameters in (a) index.php, and (b) a direct request to upload.php without any parameters.
https://exchange.xforce.ibmcloud.com/vulnerabilities/30133
http://www.vupen.com/english/advisories/2006/4421