Atlassian vulnerabilities
We track 55 vulnerabilities in Atlassian products across 33 products. 53 are rated high or critical, and 14 have been exploited in real attacks. The most recent was published on October 5, 2026.
Latest Atlassian vulnerabilities
- 8.8 High severity
Atlassian Bitbucket Server and Data Center Command Injection Exploited
Multiple API endpoints in Atlassian Bitbucket Server and Data Center 7.0.0 before version 7.6.17, from version 7.7.0 before version 7.17.10, from version 7.18.0 before version 7.21.4, from version 8.0.0 before version 8.0.3, from version 8.1.0 before version 8
- 7.2 High severity
Jira Server: Improper Control of Generation of Code
This issue exists to document that a security improvement in the way that Jira Server and Data Center use templates has been implemented. Affected versions of Atlassian Jira Server and Data Center allowed remote attackers with system administrator permissions
- 9.8 Critical severity
Atlassian Questions For Confluence App Hard-coded Credentials Exploited
The Atlassian Questions For Confluence app for Confluence Server and Data Center creates a Confluence user account in the confluence-users group with the username disabledsystemuser and a hardcoded password. A remote, unauthenticated attacker with knowledge of
- 8.8 High severity
Bamboo Server: Origin Validation Error
A vulnerability in multiple Atlassian products allows a remote, unauthenticated attacker to cause additional Servlet Filters to be invoked when the application processes requests or responses. Atlassian has confirmed and fixed the only known security issue ass
- 9.8 Critical severity
Bamboo Server: Improper Authentication
A vulnerability in multiple Atlassian products allows a remote, unauthenticated attacker to bypass Servlet Filters used by first and third party apps. The impact depends on which filters are used by each app, and how the filters are used. This vulnerability ca
- 9.8 Critical severity
Atlassian Confluence Server and Data Center Remote Code Execution Exploited
In affected versions of Confluence Server and Data Center, an OGNL injection vulnerability exists that would allow an unauthenticated attacker to execute arbitrary code on a Confluence Server or Data Center instance. The affected versions are from 1.3.0 before
- 9.8 Critical severity
Bitbucket Data Center: Deserialization of Untrusted Data
SharedSecretClusterAuthenticator in Atlassian Bitbucket Data Center versions 5.14.0 and later before 7.6.14, 7.7.0 and later prior to 7.17.6, 7.18.0 and later prior to 7.18.4, 7.19.0 and later prior to 7.19.4, and 7.20.0 allow a remote, unauthenticated attacke
- 9.8 Critical severity
Jira Core Server: Improper Authentication
A vulnerability in Jira Seraph allows a remote, unauthenticated attacker to bypass authentication by sending a specially crafted HTTP request. This affects Atlassian Jira Server and Data Center versions before 8.13.18, versions 8.14.0 and later before 8.20.6,
- 9.8 Critical severity
Atlassian Confluence Server and Data Center Object-Graph Navigation Language (OGNL) Injection Exploited
In affected versions of Confluence Server and Data Center, an OGNL injection vulnerability exists that would allow an unauthenticated attacker to execute arbitrary code on a Confluence Server or Data Center instance. The affected versions are before version 6.
- 5.3 Medium severity
Atlassian Jira Server and Data Center Path Traversal Exploited
Affected versions of Atlassian Jira Server and Data Center allow remote attackers to read particular files via a path traversal vulnerability in the /WEB-INF/web.xml endpoint. The affected versions are before version 8.5.14, from version 8.6.0 before 8.13.6, a
- 5.3 Medium severity
Atlassian Confluence Server Pre-Authorization Arbitrary File Read Exploited
Affected versions of Atlassian Confluence Server allow remote attackers to view restricted resources via a Pre-Authorization Arbitrary File Read vulnerability in the /s/ endpoint. The affected versions are before version 7.4.10, and from version 7.5.0 before 7
- 9.8 Critical severity
Atlassian Jira Server and Data Center Server-Side Template Injection Exploited
There was a server-side template injection vulnerability in Jira Server and Data Center, in the ContactAdministrators and the SendBulkMail actions. An attacker is able to remotely execute code on systems that run a vulnerable version of Jira Server or Data Cen
- 9.8 Critical severity
Atlassian Crowd and Crowd Data Center Remote Code Execution Exploited
Atlassian Crowd and Crowd Data Center had the pdkinstall development plugin incorrectly enabled in release builds. Attackers who can send unauthenticated or authenticated requests to a Crowd or Crowd Data Center instance can exploit this vulnerability to insta
- 8.8 High severity
Atlassian Confluence Server and Data Center Path Traversal Exploited
Confluence Server and Data Center had a path traversal vulnerability in the downloadallattachments resource. A remote attacker who has permission to add attachments to pages and / or blogs or to create a new space or a personal space or who has 'Admin' permiss
- 9.8 Critical severity
Atlassian Confluence Server and Data Center Server-Side Template Injection Exploited
The Widget Connector macro in Atlassian Confluence Server before version 6.6.12 (the fixed version for 6.6.x), from version 6.7.0 before 6.12.3 (the fixed version for 6.12.x), from version 6.13.0 before 6.13.3 (the fixed version for 6.13.x), and from version 6