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6
votes
6answers
1k views

Filter user input before the database or upon display?

Given a web application where user data must be properly escaped to avoid XSS, is it better to try to remove the "bad stuff" before it enters the database, or is it best to allow it in the database ...
3
votes
1answer
86 views

Server Certification Processes

We are considering a certification process for new internal server builds before they are allowed to be placed into production. That is, the system administration team will send the server up to the ...
6
votes
3answers
148 views

Obtaining e-mail address at registration

In a registration form the user is asked for his e-mail address. The e-mail address will be validated for the correct format (e.g. at the least contains @) and I'm considering checking if it's already ...
5
votes
2answers
1k views

Canonicalization & Output Encoding

I'm reading OWASP's Secure Coding Practices Checklist and under their "Input Validation" section they have an item that reads: If any potentially hazardous characters (<>"'%()&+\\'\") ...
2
votes
2answers
389 views

How to ensure an email address is not free webmail or ISP address?

I notice security companies such as Rapid 7 prevent people signing up with either free email accounts, or accounts provided by ISPs: ...
1
vote
5answers
1k views

Is it secure to use jQuery on the server-side for user input validation?

I'm thinking about using jQuery on the server-side (node.js) to validate user input (filter tags, remove every attributes except href, rel, target & style, modify css rules which are applied ...