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Atlassian Jira Service Desk 4.9.1 Cross Site Scripting

Atlassian Jira Service Desk 4.9.1 Cross Site Scripting
Posted Apr 7, 2021
Authored by Captain_hook

Atlassian Jira Service Desk version 4.9.1 suffers from a cross site scripting vulnerability via a file upload.

tags | exploit, xss, file upload
advisories | CVE-2020-14166
MD5 | 840e289057a75abee3ebef734b12ec0a

Atlassian Jira Service Desk 4.9.1 Cross Site Scripting

Change Mirror Download
# Exploit Title: Atlassian Jira Service Desk 4.9.1 - Unrestricted File Upload to XSS
# Date: 07 Mar 2020
# Exploit Author: Captain_hook
# Vendor Homepage: https://www.atlassian.com/
# Version: < 4.10.0
# Tested on: All OS
# CVE: CVE-2020-14166

Summary:

The /servicedesk/customer/portals resource in Jira Service Desk Server and Data Center before version 4.10.0 allows remote attackers with project administrator privileges to inject arbitrary HTML or JavaScript names via an Cross Site Scripting (XSS) vulnerability by uploading a html file.

Steps to reproduce:

1- reach to this directory http://localhost:port/servicedesk/customer/portals?customize=true
2- There's a place where the banner can be uploaded when upload wizard popup you can see that the banner image restricted to image format, you can change that type easily
3- then you can upload HTML and javascript files and hijacking cookies or XSRF tokens.

Original report in bugcrowd:

https://bugcrowd.com/disclosures/61a50171-aa55-4126-b9f4-4e82b4b8c301/unrestricted-file-upload-stored-xss-for-token-hijacking
Original ticket in atlassian:

https://jira.atlassian.com/browse/JSDSERVER-6895?error=login_required&error_description=Login+required&state=28f8e754-fb05-4f5e-adda-79e252fe2c30
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