[xwiki-devs] Fwd: [Question for the xwiki security feature] Hi xwiki security members - xwiki-devs@xwiki.org

18 May 2018

On Fri, May 18, 2018 at 9:35 AM, Thomas Mortagne
&lt;thomas.mortagne(a)xwiki.com&gt; wrote:
...
  On Thu, May 17, 2018 at 10:10 PM, Kwan Kim
&lt;kwk9002(a)nyp.org&gt; wrote:
   I am Kwan Kim who works for the Rogosin
Institute (medical research company specialized for Kidney disease in New York)

 Recently we tried to use xwiki as an our wiki server.

 So we configured the xwiki server on Redhat, MySQL & Glassfish environment and ask
vulnerability test team to test.

 However they found several security issues.

 And I am not a expert for the xwiki so I am not sure whether xwiki already has a solution
to fix the issues or not.

 That’s why I would like to ask you about the security features of xwiki.

 This is the security problems which the vulnerability team addressed below:

 1. Cross Site Scripting (XSS): Script insertion at Name Field in the registration form.

 When new user register, there is first and last name field. thesis fields allow
javascript code. 
 It's not very clear to me what this mean. In which context exactly the
 javascript inserted in the user name is executed ? 
The inserted javascript can be found on the profile page. See this
screenshot for instance: https://i.imgur.com/NNcSFb0.png
We could either escape HTML tags whenever first name and last name
fields are displayed or we can escape the tags directly when saving
the information on the database (but we'll need to make a migration).

...

 Is there any way we can put the some validation to prevent the javascript code  ?

 2. No controls for Account Creation

 The  vulnerability test team think it is too easy to create new account

 Is there any way that new account need to get approval from admin user ? 
 Its possible to disable registration and let admins create accounts
 but I don't think there is any support for admin validation of self
 registered users (but it's possible I missed it).

 3.Site discloses session tokens in multiple locations

 It seems xwiki use session token through URL(GET). The vulnerability test team suggest to
use POST method instead GET.

 Is there any option to use POST method instead of GET method to transmit the session
token information? 
 It's not a really a all or nothing central place so we would need to
 know where exactly you have this issue to see if there is a way to fix
 it in a case by case basis.

 4.Username retrieval with no verification

 When the user forget the username, the user can retrieve username with email address.
However it is not sent to email but show in the site.

 The vulnerability test team think the hacker can get the username if they try many
different combination of email.

 Is it possible xwiki only send the username by email instead of showing in the page ?

 Would be great if you could create an issue about that on
 http://jira.xwiki.org. Looks easy to fix, just need to discuss if we
 should do it or not. On my side I did not know we were displaying the
 user id in this page and I agree that it's probably not a good idea.

 5. Password Validation is weak

  It seems xwiki allow weak password to register new user.

 Is it possible to use strong password only when new user registered in xwiki? 
 It's possible to add a lot of constraint in the registration form. See

http://extensions.xwiki.org/xwiki/bin/view/Extension/Administration%20Appli….

 These are the all issue they addressed.

 Please let me know the answer.

 Thank you and have a good day

 Kwan Kim 

 --
 Thomas Mortagne 
Thanks for your report Kwan Kim :),
Adel Atallah