Atlassian · Jira Server and Data Center
CVE-2021-26086
Atlassian Jira Server and Data Center Path Traversal Vulnerability
What it is
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, and from version 8.14.0 before 8.16.1.
CISA: Atlassian Jira Server and Data Center contain a path traversal vulnerability that allows a remote attacker to read particular files in the /WEB-INF/web.xml endpoint.
What to do
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Deadline for US federal agencies: December 3, 2024
More exploited flaws from Atlassian
| Added | Vulnerability | Product | Severity | Attack chance |
|---|---|---|---|---|
| Mar 7, 2022 | Server-Side Template Injection | Jira Server and Data Center | Critical 9.8 | 85% |
| Oct 15, 2026 | Files or Directories Accessible to External Parties | Multiple Products | Critical 9.3 | 99.5% |
| Jan 24, 2024 | Template Injection | Confluence Data Center and Server | Critical 10.0 | >99.9% |
| Nov 7, 2023 | Improper Authorization | Confluence Data Center and Server | Critical 10.0 | >99.9% |
| Oct 5, 2023 | Broken Access Control | Confluence Data Center and Server | Critical 10.0 | 99.2% |
| Sep 30, 2022 | Command Injection | Bitbucket Server and Data Center | High 8.8 | 99.1% |
| Jul 29, 2022 | Questions For Confluence App Hard-coded Credentials | Confluence | Critical 9.8 | 98% |
| Jun 2, 2022 | Confluence Server and Data Center Remote Code Execution | Confluence Server/Data Center | Critical 9.8 | >99.9% |
Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.