Is CVE-2020-36239 actively exploited?

No active exploitation of CVE-2020-36239 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2020-36239 be exploited remotely?

Yes. CVE-2020-36239 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2020-36239?

CVE-2020-36239 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2020-36239

CWE-862Published: July 29, 2021· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Jira Data Center, Jira Core Data Center, Jira Software Data Center from version 6.3.0 before 8.5.16, from 8.6.0 before 8.13.8, from 8.14.0 before 8.17.0 and Jira Service Management Data Center from version 2.0.2 before 4.5.16, from version 4.6.0 before 4.13.8, and from version 4.14.0 before 4.17.0 exposed a Ehcache RMI network service which attackers, who can connect to the service, on port 40001 and potentially 40011[0][1], could execute arbitrary code of their choice in Jira through deserialization due to a missing authentication vulnerability. While Atlassian strongly suggests restricting access to the Ehcache ports to only Data Center instances, fixed versions of Jira will now require a shared secret in order to allow access to the Ehcache service. [0] In Jira Data Center, Jira Core Data Center, and Jira Software Data Center versions prior to 7.13.1, the Ehcache object port can be randomly allocated. [1] In Jira Service Management Data Center versions prior to 3.16.1, the Ehcache object port can be randomly allocated.

NVD Source

Technical Analysis

CVE-2020-36239 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.