CVE-2025-59302
📋 TL;DR
Apache CloudStack contains a code injection vulnerability in six administrative APIs that allows authenticated administrators to execute arbitrary JavaScript code. This affects CloudStack versions 4.18.0-4.20.1 and 4.21.0-4.21.x, potentially enabling privilege escalation or system compromise.
💻 Affected Systems
- Apache CloudStack
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Administrator compromise leading to full CloudStack control, data exfiltration, or lateral movement to underlying infrastructure
Likely Case
Privileged administrator exploiting the vulnerability to execute arbitrary code within CloudStack context
If Mitigated
Limited impact due to admin-only access requirement and proper JavaScript interpretation controls
🎯 Exploit Status
Requires admin credentials; exploitation involves crafting malicious JavaScript payloads in API calls
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.20.2 or 4.22.0
Vendor Advisory: https://lists.apache.org/thread/kwwsg2j85f1b75o0ht5zbr34d7h66788
Restart Required: Yes
Instructions:
1. Backup CloudStack configuration and database. 2. Download patched version 4.20.2 or 4.22.0. 3. Stop CloudStack services. 4. Apply upgrade following official upgrade guide. 5. Restart services and verify functionality.
🔧 Temporary Workarounds
Disable JavaScript Interpretation
allSet js.interpretation.enabled global configuration to false to disable JavaScript execution in affected APIs
update configuration set name=js.interpretation.enabled value=false
Restrict Admin API Access
allImplement network segmentation and access controls to limit admin API exposure
🧯 If You Can't Patch
- Implement strict access controls for admin accounts and monitor admin activity
- Disable JavaScript interpretation via configuration and restrict network access to admin interfaces
🔍 How to Verify
Check if Vulnerable:
Check CloudStack version via management server UI or API; versions 4.18.0-4.20.1 or 4.21.0-4.21.x are vulnerableCheck Version:
Check CloudStack UI or use API call to query system versionVerify Fix Applied:
Verify version is 4.20.2+ or 4.22.0+ and check js.interpretation.enabled configuration is set appropriately📡 Detection & Monitoring
Log Indicators:
- Unusual JavaScript patterns in admin API calls
- Multiple failed admin authentication attempts followed by successful login
Network Indicators:
- Unusual traffic patterns to admin API endpoints
- JavaScript payloads in HTTP requests to affected endpoints
SIEM Query:
source="cloudstack" AND (api="quotaTariffCreate" OR api="quotaTariffUpdate" OR api="createSecondaryStorageSelector" OR api="updateSecondaryStorageSelector" OR api="updateHost" OR api="updateStorage") AND payload CONTAINS "javascript:"