Web2py versions 2.14.5 and below was affected by Local File Inclusion vulnerability, which allows a malicious intended user to read/access web server sensitive files.
https://www.exploit-db.com/exploits/39821/
https://euvd.enisa.europa.eu/vulnerability/EUVD-2016-5789
http://packetstormsecurity.com/files/137070/Web2py-2.14.5-CSRF-XSS-Local-File-Inclusion.html