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ServiceNow ITSM Cross Site Scripting

ServiceNow ITSM Cross Site Scripting
Posted Jun 12, 2016
Authored by Omkar Joshi

ServiceNow ITSM suffers from multiple cross site scripting vulnerabilities.

tags | exploit, vulnerability, xss
SHA-256 | 5de754d8341df239d55d964aa4b842685852784088a449c0e25d0cf871eaf77e

ServiceNow ITSM Cross Site Scripting

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Vendor: ServiceNow
Vulnerable Product: ServiceNow IT Service Management (ITSM)
Vulnerability Type: Multiple Cross Site Scripting Vulnerability
Vendor Homepage:
Severity: High
Author: Omkar Joshi

Vulnerability Reported: 06/02/2016
Response From Vendor: 06/03/2016
Vendor Confirmation: 06/03/2016
Patch Released: Not yet

ServiceNow ITSM solutions give you end to end visibility into your ITIL
processes and infrastructure through a single system of record — making it
possible to consolidate fragmented tools and legacy systems while
automating service management processes. ServiceNow is easy to configure
and allows you to go live quickly with confidence, while scaling to your
business needs. With a simple and consistent approach, you increase
efficiency, lower costs, and devote more time to innovating and delivering
the modern, consumer‑like, self‑service experience your employees expect.

*Proof Of Concept
Cross Site Scritping ->*https://XXX.service-now.com/navpage.do (My Profile)
https://XXX.service-now.com/XXX_ess/home.do?sysparm_cancelable=true (My

*Reflected Cross Site Scripting ->*
https://XXX.service-now.com/XXX_ess/search_results.do?sysparm_search= (My
Portal Search Bar)

*Credits & Authors*

Omkar Joshi

*Steps to Reproduce:*

*Attack Scenario: Stored Cross Site Scripting*

Step 1. Login into ServiceNow
Step 2: Go to My Profile.
Step 3: Insert XSS payload in "First Name" & "Last Name" parameter of My
I have used "><img src=x onerror=prompt(1);> and "><img src=x
onerror=prompt(document.cookie);> XSS payload
Step 4: Then click on Update
Step 5: Whenever anyone try to visit dashboard or navigate pages of
ServiceNow XSS Script will get execute.

*Attack Scenario: Reflected Cross Site Scripting*Step 1. Login into
Step 2: Go to My Portal.
Step 3: Insert XSS payload in "Search" bar of My Portal.
I have used "><img src=x onerror=prompt("XSS");> and "><img src=x
onerror=prompt(1);> XSS payload
Step 4: Then click on Search, XSS Script will get execute.

*Impact of attack:* An attack can perform Cross Site Scripting attack and
steal the cookie of other active sessions. An attacker would exploit a
vulnerability within a website or web application that the victim would
visit, essentially using the vulnerable website as a vehicle to deliver a
malicious script to the victim’s browser.
An attacker might be able to put stored XSS into the website.

*Recommendation:* Use an appropriate combination of white listing and
blacklisting to ensure only valid and expected input is processed by the
system. Furthermore, classes within the output tag libraries should also be
modified to encode potentially dangerous characters with their HTML escape
Counter parts.

For more information refer the following link

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