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Fencer Vulns
medium 4.3

CVE-2021-43953 json

Affected versions of Atlassian Jira Server and Data Center allow unauthenticated remote attackers to toggle the Thread Contention and CPU m…

published 2022-02-15 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-30815

cvss
4.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 43%
public exploits
0
none known

Summary

Affected versions of Atlassian Jira Server and Data Center allow unauthenticated remote attackers to toggle the Thread Contention and CPU monitoring settings via a Cross-Site Request Forgery (CSRF) vulnerability in the /secure/admin/ViewInstrumentation.jspa endpoint. The affected versions are before version 8.13.16, and from version 8.14.0 before 8.20.5.

Patch / fix

  • Atlassian Jira Server 8.13.16, 8.20.5
  • Atlassian Jira Data Center 8.13.16, 8.20.5

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.50% chance of exploitation in the next 30 days, higher than 43% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P

Affected products

  • Atlassian Jira Server
  • Atlassian Jira Data Center

Classification

Weakness
  • CWE-352 Cross-Site Request Forgery

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.