CVE-2025-63562

Executive Summary

CVE-2025-63562 is an insufficient server-side authorization vulnerability in the Summer Pearl Group Vacation Rental Management Platform. Authenticated attackers can manipulate request parameters (e.g., owner or resource ID) to perform create, update, and delete actions on resources owned by arbitrary users. This IDOR (Insecure Direct Object Reference) flaw allows privilege escalation and data tampering without requiring administrative privileges. The CVSS score is 6.3 (Medium), and no public exploit code or patch is currently available.

Supply Chain & Package Security

This vulnerability is not related to any open-source package manager (NPM, PyPI, Go, Ruby). It affects a proprietary web application.

CVSS Breakdown & Threat Level

• CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L
• Base Score: 6.3 (Medium)
• Attack Vector: Network
• Attack Complexity: Low
• Privileges Required: Low (authenticated user)
• User Interaction: None
• Scope: Unchanged
• Confidentiality Impact: Low (attacker can read arbitrary user data)
• Integrity Impact: High (attacker can modify or delete arbitrary user data)
• Availability Impact: Low (attacker can delete resources, causing service disruption)

Threat Level: Medium. While the CVSS score is moderate, the ability to modify or delete arbitrary user data without authorization poses a significant risk to data integrity and user trust.

Deep Dive & Mechanics

The vulnerability stems from insufficient server-side authorization checks on API endpoints that handle CRUD operations for user resources (e.g., bookings, properties, reviews). The application relies on client-supplied parameters (e.g., owner_id, resource_id) to determine ownership, but fails to verify that the authenticated user is the legitimate owner of the resource.

Attack Flow:

1. An authenticated attacker (User A) logs into the platform.
2. The attacker intercepts a legitimate API request (e.g., PUT /api/properties/123) using a proxy tool (e.g., Burp Suite).
3. The attacker modifies the request parameter owner_id to the ID of another user (User B).
4. The server processes the request without verifying that User A owns the property, allowing the attacker to update or delete User B's property.

Affected Endpoints (likely):

• POST /api/properties (create)
• PUT /api/properties/{id} (update)
• DELETE /api/properties/{id} (delete)
• POST /api/bookings (create)
• PUT /api/bookings/{id} (update)
• DELETE /api/bookings/{id} (delete)

Vulnerable vs. Patched Code

Vulnerable Code (Server-side, pseudo-code):

@app.route('/api/properties/<int:property_id>', methods=['PUT'])
def update_property(property_id):
    data = request.get_json()
    owner_id = data.get('owner_id')  # Attacker can manipulate this
    property = Property.query.get(property_id)
    if property:
        property.owner_id = owner_id  # No ownership check
        db.session.commit()
        return jsonify(success=True)
    return jsonify(error="Property not found"), 404

Patched Code (Server-side, pseudo-code):

@app.route('/api/properties/<int:property_id>', methods=['PUT'])
@login_required
def update_property(property_id):
    data = request.get_json()
    current_user_id = session['user_id']  # From authentication
    property = Property.query.get(property_id)
    if property and property.owner_id == current_user_id:
        # Only update if the current user is the owner
        property.name = data.get('name', property.name)
        # ... other fields
        db.session.commit()
        return jsonify(success=True)
    return jsonify(error="Unauthorized"), 403

Exploitation & Lab Setup

Red Team

Prerequisites:

• A valid authenticated session on the target platform (v1.0.1 or earlier).
• A proxy tool (e.g., Burp Suite, OWASP ZAP) to intercept and modify requests.

Exploitation Steps:

1. Log in as a low-privileged user (e.g., attacker@example.com).
2. Intercept a legitimate request to update a resource (e.g., PUT /api/properties/123).
3. Modify the owner_id parameter to the ID of a target user (e.g., owner_id=456).
4. Forward the request. The server will update the resource, associating it with the target user.
5. To delete a resource, intercept a DELETE request and change the resource_id to a target resource.

Example Request (Burp Suite):

PUT /api/properties/123 HTTP/1.1
Host: target.com
Cookie: session=valid_session_cookie
Content-Type: application/json

{
  "owner_id": 456,
  "name": "Malicious Update"
}

Blue Team

Detection:

• Monitor for API requests where the owner_id or resource_id parameter differs from the authenticated user's ID.
• Alert on multiple failed authorization attempts (HTTP 403) followed by successful modifications.
• Use Web Application Firewall (WAF) rules to block requests with mismatched user IDs.

Hunting:

• Search logs for patterns like PUT /api/properties/* with owner_id not equal to the session user ID.
• Correlate user activity: if User A modifies resources owned by User B, investigate.

Indicators of Compromise (IOCs)

• Network:
  • HTTP requests with manipulated owner_id or resource_id parameters.
  • Repeated PUT, POST, or DELETE requests to /api/properties, /api/bookings, or similar endpoints.
• Logs:
  • Server logs showing owner_id changes without corresponding user authentication.
  • Error logs with 403 Forbidden followed by 200 OK for the same endpoint.
• System:
  • Unexpected changes to resource ownership in the database.
  • Deleted or modified resources without legitimate user action.

Detection Engineering

YARA Rule

rule CVE_2025_63562_IDOR_Detection {
    meta:
        description = "Detects HTTP requests with manipulated owner_id or resource_id parameters"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-63562"
    strings:
        $owner_param = /owner_id=\d+/ nocase
        $resource_param = /resource_id=\d+/ nocase
        $http_method = /(PUT|POST|DELETE)/ nocase
    condition:
        $http_method and ($owner_param or $resource_param)
}

Sigma Rule

title: CVE-2025-63562 - IDOR in Summer Pearl Group Vacation Rental Management Platform
id: 8a9b3c4d-5e6f-7a8b-9c0d-1e2f3a4b5c6d
status: experimental
description: Detects attempts to exploit insufficient server-side authorization by manipulating owner_id or resource_id parameters.
author: Valters IT
date: 2025-04-10
references:
    - https://nvd.nist.gov/vuln/detail/CVE-2025-63562
logsource:
    category: webserver
    product: apache
    service: http
detection:
    selection:
        cs-method: 
            - 'PUT'
            - 'POST'
            - 'DELETE'
        cs-uri-query|contains: 
            - 'owner_id='
            - 'resource_id='
    condition: selection
falsepositives:
    - Legitimate administrative actions (if admin uses same parameter)
level: high

Suricata Rule

alert http any any -> any any (msg:"CVE-2025-63562 - IDOR Attempt Detected"; flow:to_server; content:"PUT"; http_method; content:"owner_id="; http_uri; nocase; sid:1000001; rev:1;)
alert http any any -> any any (msg:"CVE-2025-63562 - IDOR Attempt Detected"; flow:to_server; content:"POST"; http_method; content:"owner_id="; http_uri; nocase; sid:1000002; rev:1;)
alert http any any -> any any (msg:"CVE-2025-63562 - IDOR Attempt Detected"; flow:to_server; content:"DELETE"; http_method; content:"resource_id="; http_uri; nocase; sid:1000003; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Upgrade: Update to version 1.0.2 or later if a patch becomes available.
2. WAF Rules: Deploy WAF rules to block requests with mismatched owner_id or resource_id parameters.
3. Input Validation: Implement server-side validation to ensure the authenticated user owns the resource before allowing CRUD operations.

Long-term Fixes:

• Authorization Middleware: Implement a centralized authorization middleware that checks resource ownership based on the authenticated user's session, not client-supplied parameters.
• Audit Logging: Enable detailed audit logging for all CRUD operations, including the authenticated user ID and the resource owner ID.
• Penetration Testing: Conduct regular penetration tests focusing on IDOR vulnerabilities.

Vendor Contact: Since no patch is available, contact Summer Pearl Group directly for a security update.

Valters IT
DevSecOps & Cyber Threat Intelligence Expert