Atlassian is urging immediate patching for a critical, unauthenticated vulnerability affecting Jira, Confluence, Bitbucket and other enterprise products; attackers are already exploiting it to access protected files.[1]

References:
1. https://www.bleepingcomputer.com/
2. https://www.pcmag.com/news
3. https://news.ycombinator.com/
4. https://www.computerworld.com/
5. https://www.crn.com/
6. https://www.itmedia.co.jp/news/
7. https://www.newsnow.com/us/Business/IT
8. https://itbrief.co.uk/
9. https://www.computerworld.com/news/
10. https://news.yahoo.co.jp/topics/it