sanitize user input
sanitize user input

- a **huge** thanks to Pedrito Maynard-Zhang (pedritom@amazon.com) for 
disclosing this vulnerability
- PoC confirms SQL injection at the wiki endpoint
- vulnerability is fixed by this change

cmu-delphi/delphi-epidata,cmu-delphi/delphi-epidata,cmu-delphi/delphi-epidata,cmu-delphi/delphi-epidata,cmu-delphi/delphi-epidata,cmu-delphi/delphi-epidata