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How CVE-2025-20229 Works
The vulnerability exists in Splunk Enterprise and Splunk Cloud Platform where improper authorization checks allow low-privileged users to upload malicious files to “$SPLUNK_HOME/var/run/splunk/apptemp” directory. Attackers can exploit this by crafting a specially designed file that gets executed by Splunk’s application framework. The lack of proper role validation (“admin” or “power” roles) enables unauthorized users to achieve remote code execution with the privileges of the Splunk service account. This occurs during the temporary file handling process where uploaded files are not properly sanitized before execution.
DailyCVE Form
Platform: Splunk Enterprise/Cloud
Version: <9.3.3, <9.2.5, <9.1.8
Vulnerability: Unauthorized RCE
Severity: Critical
Date: 2025-03-26
Prediction: Patch by 2025-08-15
What Undercode Say
curl -X POST -F "[email protected]" http://target:8000/apptemp/upload
import requests
requests.post('http://splunk-server:8000/apptemp', files={'file': open('malicious.spl', 'rb')})
How Exploit
1. Authenticate with low privileges
2. Upload crafted .spl file
3. Trigger execution via apptemp
4. Gain SYSTEM/root access
Protection from this CVE
1. Upgrade immediately
2. Restrict apptemp access
3. Implement role validation
Impact
1. Full system compromise
2. Data exfiltration
3. Lateral movement
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
