NeoInvoice Blind SQL Injection

`NeoInvoice is a multi-tenant open source invoicing system, that  
currently contains an unauthenticated blind SQL injection condition in  
signup_check.php. The input for the value field isn't being properly  
sanitized, and is used in string concatenation to create the SQL  
query.  
  
See here for the offending code:  
  
https://github.com/tlhunter/neoinvoice/blob/5e7af94641cba17df9141e95108c369cfb6e6dd5/public/signup_check.php#L29  
  
Proof of concept:  
  
signup_check.php?field=username&value='+OR+SLEEP(5)+OR+'  
  
I've alerted the author but haven't heard back.  
  
More Info: http://adamcaudill.com/2012/08/12/neoinvoice-blind-sql-injection-cve-2012-3477/  
Project: https://github.com/tlhunter/neoinvoice  
  
--Adam Caudill  
http://adamcaudill.com  
  
  
`