CVE-2021-43957

Name: CVE-2021-43957
Creator: NVD / NIST
Published: 2022-03-16T01:15:07.877+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.24%

Last modified Jun 17, 2026

CVE-2021-43957 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 1.24% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.24%

65.5th 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-8524Issue Tracking, Vendor Advisory
https://jira.atlassian.com/browse/FE-7388Issue Tracking, Vendor Advisory
https://jira.atlassian.com/browse/CRUC-8524Issue Tracking, Vendor Advisory
https://jira.atlassian.com/browse/FE-7388Issue Tracking, Vendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2021-43957?

How severe is CVE-2021-43957?

CVE-2021-43957 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.24% probability of exploitation in the next 30 days.

How do I fix CVE-2021-43957?

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-2021-43957?

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

Scan your code now

Source: NVD / NIST