What’s Vulnerable › Vulnerabilities

CVE-2021-39127

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-10-21 · updated 2026-06-17

Description

Affected versions of Atlassian Jira Server and Data Center allow anonymous remote attackers to the query component JQL endpoint via a Broken Access Control vulnerability (BAC) vulnerability. The affected versions are before version 8.5.10, and from version 8.6.0 before 8.13.1.

Affected products

• Atlassian Jira: before 8.5.10 — fixed in 8.5.10
• Atlassian Jira: from 8.6.0 before 8.13.1 — fixed in 8.13.1
• Atlassian Jira: from 8.6.0 before 8.13.1 — fixed in 8.13.1
• Atlassian Jira Software Data Center: before 8.5.10 — fixed in 8.5.10

How to fix

Upgrade to a fixed version: Atlassian Jira 8.5.10; Atlassian Jira 8.13.1; Atlassian Jira 8.13.1; Atlassian Jira Software Data Center 8.5.10. Check the vendor advisory for mitigations.

References

• https://jira.atlassian.com/browse/JRASERVER-72003
• https://jira.atlassian.com/browse/JRASERVER-72003

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