Is CVE-2021-39112 actively exploited?

No active exploitation of CVE-2021-39112 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-39112 be exploited remotely?

Yes. CVE-2021-39112 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-39112?

CVE-2021-39112 has a CVSS score of 4.8 (MEDIUM).

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MEDIUM

CVE-2021-39112

CWE-1022Published: August 25, 2021· Updated: Jun 17, 2026

4.8

CVSS v3.1

Official Description

Affected versions of Atlassian Jira Server and Data Center allow remote attackers to redirect users to a malicious URL via a reverse tabnapping vulnerability in the Project Shortcuts feature. The affected versions are before version 8.5.15, from version 8.6.0 before 8.13.7, from version 8.14.0 before 8.17.1, and from version 8.18.0 before 8.18.1.

NVD Source

Technical Analysis

CVE-2021-39112 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

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

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.