Is CVE-2021-43958 actively exploited?

No active exploitation of CVE-2021-43958 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-43958 be exploited remotely?

Yes. CVE-2021-43958 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-43958?

CVE-2021-43958 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2021-43958

CRITICAL

CVE-2021-43958

CWE-307Published: March 16, 2022· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2021-43958 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.