6.5

CVE-2021-39126: atlassian jira_data_center Cross-Site Request Forgery

Modified
Published 21-10-2021Last modified 10-10-2024

Vulnerability summary

CVE-2021-39126 is a medium (CVSS 6.5) Cross-Site Request Forgery vulnerability in atlassian jira_data_center. EPSS estimates a 0.73% chance of exploitation in the next 30 days, higher than 54.1% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 6.5, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
6.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.73%
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. 21-10-2021
    PublishedVulnerability first disclosed.
  2. 10-10-2024
    Last modifiedVulnerability information updated.

Description

Affected versions of Atlassian Jira Server and Data Center allow remote attackers to modify various resources via a Cross-Site Request Forgery (CSRF) vulnerability, following an Information Disclosure vulnerability in the referrer headers which discloses a user's CSRF token. The affected versions are before version 8.5.10, and from version 8.6.0 before 8.13.1.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

0.73%

Chance of exploitation in the next 30 days

Percentile

54%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.73% 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

Affected systems

Version check

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

Atlassian2 products
  • jira_data_center≥ unspecified, < 8.5.10 | ≥ 8.6.0, < unspecified | ≥ unspecified, < 8.13.1 | < 8.5.10 | ≥ 8.6.0, < 8.13.1
  • jira_server≥ unspecified, < 8.5.10 | ≥ 8.6.0, < unspecified | ≥ unspecified, < 8.13.1 | < 8.5.10 | ≥ 8.6.0, < 8.13.1

1 vendor · 2 products

References

1 links