Is CVE-2021-43959 actively exploited?

No active exploitation of CVE-2021-43959 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-43959 be exploited remotely?

Yes. CVE-2021-43959 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-43959?

CVE-2021-43959 has a CVSS score of 5.7 (MEDIUM).

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MEDIUM

CVE-2021-43959

CWE-918Published: July 26, 2022· Updated: Jun 17, 2026

5.7

CVSS v3.1

Official Description

Affected versions of Atlassian Jira Service Management Server and Data Center allow authenticated remote attackers to access the content of internal network resources via a Server-Side Request Forgery (SSRF) vulnerability in the CSV importing feature of JSM Insight. When running in an environment like Amazon EC2, this flaw may be used to access to a metadata resource that provides access credentials and other potentially confidential information. The affected versions are before version 4.13.20, from version 4.14.0 before 4.20.8, and from version 4.21.0 before 4.22.2.

NVD Source

Technical Analysis

CVE-2021-43959 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 5.7.