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.
- https://jira.atlassian.com/browse/JRASERVER-69792
- https://www.talosintelligence.com/vulnerability_reports/TALOS-2019-0836
- https://www.talosintelligence.com/vulnerability_reports/TALOS-2019-0837
- https://github.com/20142995/nuclei-templates
- https://github.com/cyb3r-w0lf/nuclei-template-collection