DokuWiki persistent Cross Site Scripting

Advisory ID: SGMA15-001
Title: DokuWiki persistent Cross Site Scripting
Product: DokuWiki
Version: 2014-09-29c and probably prior
Vendor: www.dokuwiki.org
Vulnerability type: Persistent XSS
Risk level: Medium
Credit: Filippo Cavallarin - segment.technology
CVE: N/A
Vendor notification: 2015-03-18
Vendor fix: 2015-03-19
Public disclosure: 2015-03-23

Details

DokuWiki version 2014-09-29c (and probably prior) is vulnerable to Persistent Cross Site Scriptng in the admin page.

An attacker may use this vulnerability to execute javascript in the context of a logged admin user.
Since the vulnerable page has forms with the CSRF token (the same for all requests), a full backend compromise may be possible.

To successfully exploit this vulenrability an attacked must:
1. have an account on the target site
2. trick and admin to visit a link or to edit user account

Proof of concept:

1. change your account real name to:
   my name" autofocus onfocus="alert('code executed')

2. login as admin and try to edit the user profile from User Manager

Solution

Apply the latest hotfix from vendor's site

References
https://www.dokuwiki.org/
https://github.com/splitbrain/dokuwiki/issues/1081

Filippo Cavallarin
https://segment.technology