The API in Atlassian Jira Server and Data Center before version 8.6.0 allows remote attackers to determine if a Jira project key exists or not via an information disclosure vulnerability.

Various installation setup resources in Jira before version 8.5.2 allow remote attackers to configure a Jira instance, which has not yet finished being installed, via Cross-site request forgery (CSRF) vulnerabilities.

The /plugins/servlet/gadgets/makeRequest resource in Jira before version 8.4.0 allows remote attackers to access the content of internal network resources via a Server Side Request Forgery (SSRF) vulnerability due to a logic bug in the JiraWhitelist class.

The Webwork action Cross-Site Request Forgery (CSRF) protection implementation in Jira before version 8.4.0 allows remote attackers to bypass its protection via "cookie tossing" a CSRF cookie from a subdomain of a Jira instance.

The AccessLogFilter class in Jira before version 8.4.0 allows remote anonymous attackers to learn details about other users, including their username, via an information expose through caching vulnerability when Jira is configured with a reverse Proxy and or a load balancer with caching or a CDN.

The /rest/api/1.0/render resource in Jira before version 8.4.0 allows remote anonymous attackers to determine if an attachment with a specific name exists and if an issue key is valid via a missing permissions check.

The ServiceExecutor resource in Jira before version 8.3.2 allows remote attackers to trigger the creation of export files via a Cross-site request forgery (CSRF) vulnerability.

The /rest/issueNav/1/issueTable resource in Jira before version 8.3.2 allows remote attackers to enumerate usernames via an incorrect authorisation check.