Tagged Questions

0
votes
1answer
207 views

Sanitizing JavaScript to prevent XSS

I'm going through a vulnerability remediation exercise for a client and am trying to figure out how to best mitigate this particular hole. There's a script on our site that calls up content into a new ...
1
vote
2answers
465 views

HTML encoding to protect against XSS

While going through some references about protection against XSS i found that it is a good practice to encode data (entered by users) before using it to generate a dynamic page. I was not able to find ...
3
votes
1answer
1k views

DOM Based XSS attacks: what is the most dangerous example?

I knew that XSS attacks (“non-persistent” and “persistent”) can hijack user session, deface websites, conduct phishing attack, etc. However, I can't understand what is dangerous of DOM Based XSS if ...
0
votes
1answer
376 views

How to escape user input in a value of javascript object?

How to properly escape user-controlled input when it's inserted as a value in JSON object? <script> $(document).ready(function() { new MyObject({ key1: "user_input", key2: ...
3
votes
2answers
322 views

Is Drupal's filter_xss enough for filtering HTML?

Drupal has filter_xss function. Is it safe to use for filtering arbitrary user HTML input? If not, what should be used instead when using Drupal 7? This questuion is a duplicate of Drupal's built-in ...
7
votes
2answers
587 views

Interpolique: transparently preventing SQL Injection and XSS with base64 encoding, what happened?

For the keynote at The Next HOPE a couple of years ago, Dan Kaminsky unveiled Interpolique (the talk is really fun btw). The problem he raised was how to defend against injection attacks, including ...
9
votes
2answers
2k views

How to address XSS security issues in FCKeditor / CKeditor?

A security report we conducted through an outside company reported XSS vulnerabilities in FCKeditor which we're using in our PHP application. They pointed out that accessing URLs such as: ...
8
votes
7answers
918 views

Whitelisting DOM elements to defeat XSS

As we know, developers are responsible for correctly escaping/validating data provided by the user before rendering or storing them. However, we must agree that it's relatively easy to forget a single ...
19
votes
6answers
308 views

User input data, is filtering enough or should it be parsed?

In a webapplication there could be two approaches to migate XSS attacks. All the input data could be filtered (removing all 'bad' data), or the input could be parsed, tokenized and output with only ...
13
votes
3answers
677 views

Rails - protection against code injection and XSS

I've started using Ruby on Rails, and I was wondering if there were any security gotchas to watch out for with Rails, particularly regarding code injection and XSS? I know Rails tries to prevent ...