CVE-2024-21683Network attack vector

Admin-authenticated code execution via Java language upload

Published May 21, 2024 · Updated May 12, 2025

Remote code execution in Atlassian Confluence Data Center allows remote authenticated users with admin access to run arbitrary server code. The Configure Code Macro page accepts a malicious Java file as a new language and executes its contents without adequate input validation. Exploitation requires permission to add code-macro languages and grants code execution in the Confluence server process.

CVSS severity7.2
High
EPSS probability88.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Remote code execution in Atlassian Confluence Data Center allows remote authenticated users with admin access to run arbitrary server code. The Configure Code Macro page accepts a malicious Java file as a new language and executes its contents without adequate input validation. Exploitation requires permission to add code-macro languages and grants code execution in the Confluence server process.

The record

CVE
CVE-2024-21683
Published
May 21, 2024
Updated
May 12, 2025
Vendor
Atlassian
Product
Confluence Data Center
Classifications
T1505.004
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. May 21, 2024CVE publishedPublication date reported by the CVE source.
  2. May 12, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=7.19.0 <=7.1921
  2. Affected versionversion=7.19.0 to 7.19.21
  3. Affected versionversion=7.19.22
  4. Affected versionversion=7.20.0 <=7.20.3
  5. Affected versionversion=7.20.0 to 7.20.3
  6. Affected versionversion=8.0.0 <=8.0.4
  7. Affected versionversion=8.0.0 to 8.0.4
  8. Affected versionversion=8.1.0 <=8.1.4
  9. Affected versionversion=8.1.0 to 8.1.4
  10. Affected versionversion=8.2.0 <=8.2.3
  11. Affected versionversion=8.2.0 to 8.2.3
  12. Affected versionversion=8.3.0 <=8.3.4
  13. Affected versionversion=8.3.0 to 8.3.4
  14. Affected versionversion=8.4.0 <=8.4.5
  15. Affected versionversion=8.4.0 to 8.4.5
  16. Affected versionversion=8.5.0 <=8.5.8
  17. Affected versionversion=8.5.0 to 8.5.8
  18. Affected versionversion=8.5.9
  19. Affected versionversion=8.6.0 <=8.6.2
  20. Affected versionversion=8.6.0 to 8.6.2
  21. Affected versionversion=8.7.1 <=8.7.2
  22. Affected versionversion=8.7.1 to 8.7.2
  23. Affected versionversion=8.8.0 <=8.8.1
  24. Affected versionversion=8.8.0 to 8.8.1
  25. Affected versionversion=8.9.0
  26. Affected versionversion=8.9.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Atlassian · Confluence Data Centerversion=7.19.0 <=7.1921; version=7.19.0 to 7.19.21; version=7.19.22; version=7.20.0 <=7.20.3; version=7.20.0 to 7.20.3; version=8.0.0 <=8.0.4; version=8.0.0 to 8.0.4; version=8.1.0 <=8.1.4; version=8.1.0 to 8.1.4; version=8.2.0 <=8.2.3; version=8.2.0 to 8.2.3; version=8.3.0 <=8.3.4; version=8.3.0 to 8.3.4; version=8.4.0 <=8.4.5; version=8.4.0 to 8.4.5; version=8.5.0 <=8.5.8; version=8.5.0 to 8.5.8; version=8.5.9; version=8.6.0 <=8.6.2; version=8.6.0 to 8.6.2; version=8.7.1 <=8.7.2; version=8.7.1 to 8.7.2; version=8.8.0 <=8.8.1; version=8.8.0 to 8.8.1; version=8.9.0; version=8.9.1

Published CVSS scores

7.2AtlassianCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1505.004Server Software Component

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo