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How the CVE Works:
This vulnerability is a server-side template injection (SSTI) flaw in Elastic Cloud Enterprise’s (ECE) use of the Jinjava templating engine. An authenticated attacker with administrative privileges can inject malicious Jinjava expressions into user-controlled input fields that are processed by the template engine. ECE fails to neutralize special elements in these inputs. When the backend renders the template, it evaluates the injected expressions. This allows the attacker to execute arbitrary Java code within the application’s context, leading to remote command execution on the underlying host, system compromise, and full exfiltration of sensitive data from the ECE platform.
dailycve form:
Platform: Elastic Cloud Enterprise
Version: ECE
Vulnerability: Template Injection
Severity: Critical
date: 2025-10-13
Prediction: 2025-12-20
What Undercode Say:
curl -sk -H "Authorization: ApiKey ..." $ECE_API/target | grep -i jinjava
// Example malicious Jinjava expression
{{'a'.getClass().forName('java.lang.Runtime').getMethod('exec',''.getClass()).invoke(''.getClass().forName('java.lang.Runtime').getMethod('getRuntime').invoke(null), 'cat /etc/passwd')}}
How Exploit:
1. Attacker with admin credentials logs into ECE.
- Finds input field rendered via Jinjava (e.g., certain config fields).
3. Injects crafted Jinjava expression to execute commands.
4. Expression is evaluated server-side, granting RCE.
Protection from this CVE:
1. Apply vendor patch.
2. Sanitize template inputs.
3. Principle of least privilege.
Impact:
Remote Code Execution,
Data Exfiltration,
Full System Compromise
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Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
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