CVE-2021-39127 Missing authorization in Jira Data Center

What is CVE-2021-39127?

CVE-2021-39127 is a medium-severity missing authorization vulnerability in Atlassian Jira, published on 21 Oct 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Which versions are affected by CVE-2021-39127?

It affects 4 products.

Products include Atlassian Jira, Atlassian Jira Data Center, Atlassian Jira Server, Atlassian Jira Software Data Center.

How do I fix CVE-2021-39127?

No fix has been published for CVE-2021-39127 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2021-39127 being exploited?

There is no known exploitation of CVE-2021-39127 in the wild and no public exploit code.

Other vulnerabilities in Atlassian Jira

• CVE-2020-14172 Deserialization in Jira Server Critical 9.8
• CVE-2019-20409 Code injection in Jira Server Critical 9.8
• CVE-2017-5983 Deserialization in n/a Critical 9.8
• CVE-2010-1165 Code injection in n/a Critical 9.0
• CVE-2016-4319 Cross-site request forgery in Atlassian JIRA Server before 7.1.9 High 8.8

All Atlassian Jira vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-wwr3-qq72-5vcc.