CVE-2021-43957

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% 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-639

Description

Affected versions of Atlassian Fisheye & Crucible allowed remote attackers to browse local files via an Insecure Direct Object References (IDOR) vulnerability in the WEB-INF directory and bypass the fix for CVE-2020-29446 due to a lack of url decoding. The affected versions are before version 4.8.9.

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

https://jira.atlassian.com/browse/CRUC-8524
https://jira.atlassian.com/browse/FE-7388
https://jira.atlassian.com/browse/CRUC-8524
https://jira.atlassian.com/browse/FE-7388

Get alerted when CVE-2021-43957 or the next vulnerability affects your stack