CVE-2021-26081 Information disclosure in Jira Data Center

What is CVE-2021-26081?

CVE-2021-26081 is a medium-severity vulnerability in Atlassian Jira, published on 20 Jul 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

REST API in Atlassian Jira Server and Jira Data Center before version 8.5.14, from version 8.6.0 before 8.13.6, and from version 8.14.0 before 8.16.1 allows remote attackers to enumerate usernames via a Sensitive Data Exposure vulnerability in the `/rest/api/latest/user/avatar/temporary` endpoint.

Which versions are affected by CVE-2021-26081?

It affects 4 products.

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

How do I fix CVE-2021-26081?

No fix has been published for CVE-2021-26081 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-26081 being exploited?

There is no known exploitation of CVE-2021-26081 in the wild and no public exploit code.

Other vulnerabilities in Atlassian Jira

• CVE-2017-18113 Code injection in Jira Data Center High 8.8
• CVE-2021-41312 Auth bypass in Jira Data Center High 7.5
• CVE-2021-39123 Denial of service in Jira Data Center High 7.5
• CVE-2021-39113 Missing authorization in Jira Data Center High 7.5
• CVE-2021-43947 Code injection in Jira Data Center High 7.2

All Atlassian Jira vulnerabilities

Sources

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

Also known as GHSA-v3g7-jggh-wjhg.