Coverage › CVE-2023-22527

CVE-2023-22527 Mapped Sigma

Atlassian Confluence Data Center and Server Template Injection Vulnerability

Vendor / product

Atlassian — Confluence Data Center and Server

Description (CISA)

Atlassian Confluence Data Center and Server contain an unauthenticated OGNL template injection vulnerability that can lead to remote code execution.

Added to KEV

2024-01-24

Due date

2024-02-14

Required action

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Known ransomware use

Known

CWE

CWE-74

CISA notes

https://confluence.atlassian.com/security/cve-2023-22527-rce-remote-code-execution-vulnerability-in-confluence-data-center-and-confluence-server-1333990257.html
https://nvd.nist.gov/vuln/detail/CVE-2023-22527

Elsewhere

cve.org · NVD · CISA KEV · JSON

ATT&CK techniques · CTID Mappings Explorer, ATT&CK 16.1, KEV snapshot 2025-07-28

2 mapping objects across 2 techniques. exploitation technique states how the vulnerability is exploited; primary and secondary impact state what exploitation achieves. They are different claims and are labelled as such.

Detection chain · ATT&CK Enterprise v19.2 detection strategies, analytics, log sources

T1221 Template Injection exploitation technique

• DET0566 Template Injection Detection - Windows
  AN1564 Windows

  Detection of Office or document viewer processes (e.g., winword.exe) initiating network connections to remote templates or executing scripts due to manipulated template references (e.g., embedded in .docx, .rtf, or .dotm files), followed by suspicious child process creation (e.g., PowerShell).

  WinEventLog:Sysmon EventCode=1 → DC0032 Process Creation

  WinEventLog:Sysmon EventCode=3, 22 → DC0082 Network Connection Creation

  Tunable: TemplateURLPatterns ParentProcess TimeWindow ChildProcessAnomalyThreshold

Sigma rules tagged attack.t1221 (2)

T1496 Resource Hijacking primary impact

• DET0267 Resource Hijacking Detection Strategy
  AN0741 Windows

  Persistent high CPU utilization combined with suspicious command-line execution (e.g., mining tools or obfuscated scripts) and outbound connections to mining/proxy networks.

  WinEventLog:Sysmon EventCode=1 → DC0032 Process Creation

  Windows:perfmon High sustained CPU usage by a single process → DC0018 Host Status

  WinEventLog:Sysmon EventCode=3, 22 → DC0082 Network Connection Creation

  Tunable: TimeWindow DestinationIPList ExecutableNamePatterns
  AN0742 Linux

  Abnormal CPU/memory usage by unauthorized processes with outbound connections to known mining pools or using cron jobs/scripts to maintain persistence.

  auditd:SYSCALL execve → DC0032 Process Creation

  linux:procfs Sustained high /proc/[pid]/stat usage → DC0018 Host Status

  NSM:Flow Outbound traffic to mining pools or proxies → DC0078 Network Traffic Flow

  Tunable: ProcessPath CPUThreshold KnownMiningDomains
  AN0743 macOS

  Background launch agents/daemons with high CPU use and network access to external mining services.

  macos:unifiedlog launchctl activity and process creation → DC0032 Process Creation

  macos:unifiedlog Persistent outbound traffic to mining domains → DC0085 Network Traffic Content

  Tunable: launchdLabel TrafficVolumeThreshold
  AN0744 IaaS

  Sudden spikes in cloud VM CPU usage with outbound traffic to mining pools and unauthorized instance creation.

  AWS:CloudTrail RunInstances → DC0080 Instance Start

  AWS:CloudWatch Sustained EC2 CPU usage above normal baseline → DC0018 Host Status

  AWS:VPCFlowLogs Outbound flow logs to known mining pools → DC0078 Network Traffic Flow

  Tunable: CPUUtilizationThreshold UnusualRegionList
  AN0745 Containers

  High CPU usage by unauthorized containers running mining binaries or public proxy tools.

  containerd:events New container with suspicious image name or high resource usage → DC0032 Process Creation

  prometheus:metrics Container CPU/Memory usage exceeding threshold → DC0018 Host Status

  container:cni Outbound network traffic to mining proxies → DC0078 Network Traffic Flow

  Tunable: ImageName CPUQuotaThreshold
  AN0746 SaaS

  Abuse of cloud messaging platforms to send mass spam or consume quota-based resources.

  m365:unified SendMessage → DC0069 Cloud Service Modification

  saas:application High-volume API calls or traffic via messaging or webhook service → DC0038 Application Log Content

  Tunable: MessageRateThreshold APIKeyList

Sigma rules tagged attack.t1496 (13)