Jira before 8.4.0 is susceptible to server-side request forgery. The /plugins/servlet/gadgets/makeRequest resource contains a logic bug in the JiraWhitelist class, which can allow an attacker to access the content of internal network resources and thus modify data, and/or execute unauthorized operations.
View the template here CVE-2019-8451.yaml
References:
https://jira.atlassian.com/browse/JRASERVER-69793