CVE-2021-43958

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-03-16 · updated 2026-06-17
Weakness: CWE-307

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.

Affected products

Atlassian Crucible: before 4.8.9 — fixed in 4.8.9
Atlassian Fisheye: before 4.8.9 — fixed in 4.8.9

How to fix

Upgrade to a fixed version: Atlassian Crucible 4.8.9; Atlassian Fisheye 4.8.9. Check the vendor advisory for mitigations.

References

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