# Exploit Title: Atlassian Jira Server/Data Center 8.16.0 - Reflected Cross-Site Scripting (XSS) # Date: 06/05/2021 # Exploit Author: CAPTAIN_HOOK # Vendor Homepage: https://www.atlassian.com/ # Software Link: https://www.atlassian.com/software/jira/download/data-center # Version: versions < 8.5.14, 8.6.0 ≤ version < 8.13.6, 8.14.0 ≤ version < 8.16.1 # Tested on: ANY # CVE : CVE-2021-26078 Description: The number range searcher component in Jira Server and Jira Data Center before version 8.5.14, from version 8.6.0 before version 8.13.6, and from version 8.14.0 before version 8.16.1 allows remote attackers inject arbitrary HTML or JavaScript via across site scripting (XSS) vulnerability *Fixed versions:* - 8.5.14 - 8.13.6 - 8.16.1 - 8.17.0 POC: - *Story points* custom field that exists by default in all JIRA Server has 3 types of Search template ( None , number range searcher, number searcher) By default the value of Search template is number range searcher OR number searcher. if the value of Search template was set on number range searcher the JIRA server is vulnerable to XSS attack by lowest privilege . For Testing Check the Story points custom field and it's details ( for verifying that the Search template sets on number range searcher) with your ADMIN account ( just like the images) and in the other window Type this With your least privilege user : jql=issuetype%20%3D%20Epic%20AND%20%22Story%20Points%22%20%3C%3D%20%22%5C%22%3E%3Cscript%3Ealert(document.cookie)%3C%2Fscript%3E%22%20AND%20%22Story%20Points%22%20%3E%3D%20%221%22 Your XSS Will be triggered immediately. Reference: https://jira.atlassian.com/browse/JRASERVER-72392?error=login_required&error_description=Login+required&state=9b05ec1f-587c-4014-9053-b6fdbb1efa21