CVE-2021-43958

Name: CVE-2021-43958
Creator: NVD / NIST
Published: 2022-03-16T01:15:07.95+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.41%

Last modified Jun 17, 2026

CVE-2021-43958 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Various rest resources in Fisheye and Crucible before version 4.8.9 allowed remote attackers to brute force user login credentials as rest resources did not check if users were beyond their max failed login limits and therefore required solving a CAPTCHA in addition to providing user credentials for authentication via a improper restriction of excess authentication attempts vulnerability.. EPSS estimates a 1.41% chance of exploitation in the next 30 days.

Description

Various rest resources in Fisheye and Crucible before version 4.8.9 allowed remote attackers to brute force user login credentials as rest resources did not check if users were beyond their max failed login limits and therefore required solving a CAPTCHA in addition to providing user credentials for authentication via a improper restriction of excess authentication attempts vulnerability.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

1.41%

69.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Atlassian	Crucible	< 4.8.9
Atlassian	Fisheye	< 4.8.9

References

https://jira.atlassian.com/browse/CRUC-8523Issue Tracking, Vendor Advisory
https://jira.atlassian.com/browse/FE-7387Issue Tracking, Vendor Advisory
https://jira.atlassian.com/browse/CRUC-8523Issue Tracking, Vendor Advisory
https://jira.atlassian.com/browse/FE-7387Issue Tracking, Vendor Advisory

Timeline

Published: Mar 16, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-43958?

How severe is CVE-2021-43958?

CVE-2021-43958 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.41% probability of exploitation in the next 30 days.

How do I fix CVE-2021-43958?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-43958?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST