5.3

CVE-2021-26081: atlassian data_center

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

Vulnerability summary

CVE-2021-26081 is a medium (CVSS 5.3) vulnerability in atlassian data_center. EPSS estimates a 1.18% chance of exploitation in the next 30 days, higher than 67.8% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.3, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
1.18%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 20-07-2021
    PublishedVulnerability first disclosed.
  2. 11-10-2024
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

1.18%

Chance of exploitation in the next 30 days

Percentile

68%

Versus all other CVEs

30-day change

No change 0.00 pp

From 1.18% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Atlassian4 products
  • data_center< 8.5.14
  • jira< 8.5.14
  • jira_data_center≥ unspecified, < 8.5.14 | ≥ 8.6.0, < unspecified | ≥ unspecified, < 8.13.6 | ≥ 8.14.0, < unspecified | ≥ unspecified, < 8.16.1 | ≥ 8.6.0, < 8.13.6 | ≥ 8.14.0, < 8.16.1
  • jira_server≥ unspecified, < 8.5.14 | ≥ 8.6.0, < unspecified | ≥ unspecified, < 8.13.6 | ≥ 8.14.0, < unspecified | ≥ unspecified, < 8.16.1 | ≥ 8.6.0, < 8.13.6 | ≥ 8.14.0, < 8.16.1

1 vendor · 4 products

References

1 links