CVE-2025-37729
📋 TL;DR
This CVE describes a template injection vulnerability in Elastic Cloud Enterprise (ECE) where Jinjava template variables are improperly neutralized. An attacker with Admin access can exploit this to exfiltrate sensitive information and execute arbitrary commands via specially crafted strings. Only Elastic Cloud Enterprise deployments with administrative accounts are affected.
💻 Affected Systems
- Elastic Cloud Enterprise
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Admin-level attacker achieves remote code execution, exfiltrates all sensitive data (credentials, configurations, customer data), and gains persistent access to the entire ECE environment and underlying infrastructure.
Likely Case
Malicious insider or compromised admin account uses template injection to extract secrets, modify configurations, and potentially execute limited commands within the ECE context.
If Mitigated
With proper access controls and network segmentation, impact is limited to the ECE application layer, preventing lateral movement to other systems.
🎯 Exploit Status
Exploitation requires admin credentials but the template injection mechanism is straightforward once authenticated.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: ECE 3.8.2 and 4.0.2
Vendor Advisory: https://discuss.elastic.co/t/elastic-cloud-enterprise-ece-3-8-2-and-4-0-2-security-update-esa-2025-21/382641
Restart Required: Yes
Instructions:
1. Backup ECE configuration and data. 2. Download ECE 3.8.2 or 4.0.2 from Elastic downloads. 3. Follow Elastic's upgrade documentation for your deployment type. 4. Restart ECE services after upgrade.
🔧 Temporary Workarounds
Restrict Admin Access
allLimit administrative accounts to only essential personnel and implement multi-factor authentication
Network Segmentation
allIsolate ECE management interfaces from general network access
🧯 If You Can't Patch
- Implement strict access controls and monitoring for all administrative accounts
- Deploy network segmentation to limit ECE management interface exposure
🔍 How to Verify
Check if Vulnerable:
Check ECE version via ECE admin UI or API. Versions before 3.8.2 (for 3.x) or 4.0.2 (for 4.x) are vulnerable.Check Version:
ece version (from ECE host) or check Admin UI → AboutVerify Fix Applied:
Confirm ECE version is 3.8.2 or higher for 3.x branch, or 4.0.2 or higher for 4.x branch.📡 Detection & Monitoring
Log Indicators:
- Unusual template rendering patterns in ECE logs
- Admin account activity with unusual template syntax
- Jinjava evaluation errors with suspicious payloads
Network Indicators:
- Unusual outbound connections from ECE management interfaces
- Data exfiltration patterns from ECE systems
SIEM Query:
source="ece-logs" AND ("template injection" OR "jinjava" AND "evaluation")