CVE-2021-26081 | BDVDB-2026-157382 Detail

AtlassianJira Server

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.

Impact#

Per CVSS v3.1: confidentiality impact low, integrity impact none, availability impact none. Attack vector: network.

Weaknesses#

No weakness recorded in the source data.

References#

https://jira.atlassian.com/browse/JRASERVER-72499

Exploit#

No public exploit known

History#

Version 12021-07-20Record published in the CVE List.
Version 22024-10-11Most recent update recorded in the CVE List.

Published

Published: 2021-07-20
Last modified: 2024-10-11

Vendor information

Vendor: Atlassian
Product: Jira Server

All Atlassian vulnerabilities

Score

5.3 Medium

EPSS

1.2%, Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 70.0.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Not classified

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
< 8.5.14
Fixed
8.5.14
Vulnerable
8.6.0
Fixed
Not stated
Vulnerable
< 8.13.6
Fixed
8.13.6
Vulnerable
8.14.0
Fixed
Not stated
Vulnerable
< 8.16.1
Fixed
8.16.1

Scoring System

CVSS v4.0

Not available

CVSS v3.1

5.3 Medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality	Low
Integrity	None
Availability	None

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).