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Fencer Vulns
high 8.8

CVE-2024-21683 in the critical feed json

This High severity RCE (Remote Code Execution) vulnerability was introduced in version 5.2 of Confluence Data Center and Server.

published 2024-05-21 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-19299

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
88.3%
EPSS 88.3% chance of exploitation in 30 days, percentile 99.7%
public exploits
1
Metasploit, plus a Nuclei check

Summary

This High severity RCE (Remote Code Execution) vulnerability was introduced in version 5.2 of Confluence Data Center and Server.

This RCE (Remote Code Execution) vulnerability, with a CVSS Score of 7.2, allows an authenticated attacker to execute arbitrary code which has high impact to confidentiality, high impact to integrity, high impact to availability, and requires no user interaction.

Atlassian recommends that Confluence Data Center and Server customers upgrade to latest version. If you are unable to do so, upgrade your instance to one of the specified supported fixed versions. See the release notes https://confluence.atlassian.com/doc/confluence-release-notes-327.html

You can download the latest version of Confluence Data Center and Server from the download center https://www.atlassian.com/software/confluence/download-archives.

This vulnerability was found internally.

Patch / fix

  • Atlassian Confluence Data Center 7.19.22 to 7.19.23, 8.5.9 to 8.5.10, 8.9.1 to 8.9.2

Timeline

  1. First public exploit (Metasploit exploit/multi/http/atlassian_confluence_rce_cve_2024_21683)
  2. Published

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
2 y ago

Exploit prediction

88.27% chance of exploitation in the next 30 days, higher than 99.7% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

CVSS scores

assigned by version score vector
CNA 3.1 7.2 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Atlassian Confluence Data Center
  • atlassian confluence_data_center

Classification

Weakness
  • CWE-94 Improper Control of Generation of Code

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.