CVE-2021-43947Network attack vector

Administrator RCE via email template injection

Published Jan 6, 2022 · Updated Oct 8, 2024

Remote code execution in Atlassian Jira Server and Data Center before 8.13.15 and 8.14.0 through 8.20.2 lets remote authenticated users run code. The Email Templates feature evaluates attacker-controlled template content, but Atlassian has not disclosed the affected code path or validation failure. Jira administrator privileges are required, and successful exploitation executes arbitrary code with the Jira service process privileges.

CVSS severity7.2
High
EPSS probability4.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Remote code execution in Atlassian Jira Server and Data Center before 8.13.15 and 8.14.0 through 8.20.2 lets remote authenticated users run code. The Email Templates feature evaluates attacker-controlled template content, but Atlassian has not disclosed the affected code path or validation failure. Jira administrator privileges are required, and successful exploitation executes arbitrary code with the Jira service process privileges.

The record

CVE
CVE-2021-43947
Published
Jan 6, 2022
Updated
Oct 8, 2024
Vendor
Atlassian
Product
Jira Server
Classifications
Unavailable
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jan 6, 2022CVE publishedPublication date reported by the CVE source.
  2. Oct 8, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <8.13.15
  2. Affected versionversion=8.14.0 <8.20.3
  3. Affected versionversion=8.14.0 <unspecified
  4. Affected versionversion=unspecified <8.13.15
  5. Affected versionversion=unspecified <8.20.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Atlassian · Jira Serverversion=0 <8.13.15; version=8.14.0 <8.20.3; version=8.14.0 <unspecified; version=unspecified <8.13.15; version=unspecified <8.20.3
Atlassian · Jira Data Centerversion=0 <8.13.15; version=8.14.0 <8.20.3; version=8.14.0 <unspecified; version=unspecified <8.13.15; version=unspecified <8.20.3

Published CVSS scores

9.0NIST NVDAV:N/AC:L/Au:S/C:C/I:C/A:C
7.2CISA-ADPCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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