CVE-2020-36239
No exploitation reported by the sources we read.
- Published2021-07-29
- Fixed in8.17.0 · 8.13.8 · 8.5.16
- WeaknessCWE-306 · CWE-862
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
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.
Timeline
dates in UTC- 2021-07-2911:15CVE publishedNVD
- 2026-10-2319:23EPSS crossed 10 %FIRST EPSS
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-36239?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-36239?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD · CISA-ADP| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 8.x | ≥ 8.14.0, < 8.17.0 | 8.17.0 | NVD · CISA-ADP |
| 8.x | ≥ 8.6.0, < 8.13.8 | 8.13.8 | NVD · CISA-ADP |
| 8.5 | ≥ 6.3.0, < 8.5.16 | 8.5.16 | NVD · CISA-ADP |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 4.x | ≥ 4.6.0, < 4.13.8 | 4.13.8 | NVD · CISA-ADP |
| 4.5 | ≥ 2.0.2, < 4.5.16 | 4.5.16 | NVD · CISA-ADP |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 4.x | ≥ 4.14.0, < 4.17.0 | 4.17.0 | NVD · CISA-ADP |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
- Update Atlassian Jira to 8.17.0 · 8.13.8 · 8.5.16
Advisories and patches
- confluence.atlassian.comPatch · Vendor Advisory
- jira.atlassian.comVendor Advisory
- jira.atlassian.comVendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
- CISA-ADPSSVC decisionnone2024-10-17
- OpenCVESSVC decisionnone—
- CISA-ADPCVSS 3.19.82024-10-17
- NVDCVSS 3.19.8read 2026-10-23
- NVDCVSS 2.07.5read 2026-10-23
- CISA-ADPweakness (CWE)CWE-8622024-10-17
- CNAweakness (CWE)CWE-862read 2026-10-23
- NVDweakness (CWE)CWE-306read 2026-10-23
- FIRST EPSSEPSS score49.8 %read 2026-10-23
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Published
- 2021-07-29
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
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Related vulnerabilities
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