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CVE

CVE-2021-26081

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

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.

MEDIUM · CVSS 5.3 EPSS 0.00514
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  • SSVC automatable: yes - attacks can be scripted at scale
Sigma rules0 YARA rules0
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Affected Products & Versions

6
atlassian data center< 8.5.14
atlassian jira< 8.5.14
atlassian jira data center>= 8.6.0 and < 8.13.6
atlassian jira data center>= 8.14.0 and < 8.16.1
atlassian jira server>= 8.6.0 and < 8.13.6
atlassian jira server>= 8.14.0 and < 8.16.1
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Scoring & Timeline

5.3
MEDIUM · CVSS v3.1 · security@atlassian.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD20 Jul 2021 · 04:15 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
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References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://jira.atlassian.com/browse/JRASERVER-72499PatchVendor Advisory
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