PT-2021-16948 · Atlassian · Jira

Published 2021-07-20 · Updated 2024-10-11 · CVE-2021-26081

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Name of the Vulnerable Software and Affected Versions Atlassian Jira Server and Jira Data Center versions 8.5.13 and earlier Atlassian Jira Server and Jira Data Center versions 8.6.0 through 8.13.5 Atlassian Jira Server and Jira Data Center versions 8.14.0 through 8.16.0

Description The issue allows remote attackers to enumerate usernames via a Sensitive Data Exposure vulnerability in the "/rest/api/latest/user/avatar/temporary" endpoint. This enables attackers to potentially identify and target specific users.

Recommendations For versions 8.5.13 and earlier, update to version 8.5.14 or later. For versions 8.6.0 through 8.13.5, update to version 8.13.6 or later. For versions 8.14.0 through 8.16.0, update to version 8.16.1 or later. As a temporary workaround, consider restricting access to the "/rest/api/latest/user/avatar/temporary" endpoint until a patch is available.

Fix

Related Identifiers

CVE-2021-26081

Affected Products

Jira

References · 5

• https://osv.dev/vulnerability/CVE-2021-26081 · Vendor Advisory
• https://jira.atlassian.com/browse/JRASERVER-72499 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-26081 · Security Note
• https://t.me/cibsecurity/26273 · Telegram Post
• https://t.me/cvenotify/17905 · Telegram Post