UpHeron
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Servers and applications

CVE-2023-22527

A template injection vulnerability on older versions of Confluence Data Center and Server allows an unauthenticated attacker to achieve RCE on an affected instance. Customers using an affected version must take immediate action. Most recent supported versions of Confluence Data Center and Server are not affected by this vulnerability as it was ultimately mitigated during regular version updates.…

Actively exploited: CISA added it to its Known Exploited Vulnerabilities catalog on 24 Jan 2024.

Severity
Critical 9.8
Published
16 Jan 2024
Last changed
17 Jun 2026
Added to UpHeron
21 Oct 2026
Fixed in
8.5.4
Sources
NVD

Affected software

SoftwareAffected versions
ConfluenceServers and applications · cpe:a:atlassian:confluence_data_center
  • From 8.0.0 before 8.5.4
  • Version 8.7.0
ConfluenceServers and applications · cpe:a:atlassian:confluence_server
  • From 8.0.0 before 8.5.4

Known exploited

CISA name
Atlassian Confluence Data Center and Server Template Injection Vulnerability
Required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Due for US agencies
14 Feb 2024
Used in ransomware
Yes, known

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2023-22527
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2023-22527