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How the CVE Works
The vulnerability (CVE-2025-XXXXX) in Laravel Rest API before v2.13.0 occurs due to improper validation rule merging. When multiple validation rules are defined for the same attribute across different contexts (e.g., index, store, update), the framework incorrectly overwrites earlier rules instead of combining them. Attackers can exploit this by sending crafted API requests with malicious input that bypasses intended restrictions. For example, if a field is restricted to alphanumeric characters in one context but lacks proper validation in another, an attacker could inject SQL or NoSQL queries. The flawed merging logic allows unexpected data to reach backend processing, potentially leading to data corruption or unauthorized access.
DailyCVE Form
Platform: Laravel Rest API
Version: < 2.13.0
Vulnerability: Validation Bypass
Severity: Moderate
Date: May 25, 2025
Prediction: Patch expected by June 5, 2025
What Undercode Say:
Exploitation Analysis
1. Craft Malicious Request:
POST /api/resource HTTP/1.1
{"field": {"$ne": 1}}
2. Bypass Sanitization: If `field` has weak validation in one context, payloads like NoSQL operators may pass.
Protection Measures
1. Update Immediately:
composer require lomkit/laravel-rest-api:^2.13.0
2. Manual Rule Merge Fix: Override `mergeRules()` in custom validators:
protected function mergeRules(array $rules) {
return array_merge_recursive(parent::mergeRules($rules), $rules);
}
Detection Commands
1. Check Installed Version:
composer show lomkit/laravel-rest-api | grep versions
2. Log Analysis for Bypass Attempts:
grep -E '(\$ne|\$gt|\$where)' storage/logs/laravel.log
Additional Hardening
1. Strict Mode Validation:
public function rules() {
return ['field' => 'required|string|strict'];
}
2. Middleware Sanitization:
public function handle($request, $next) {
$request->replace(array_map('htmlspecialchars', $request->all()));
return $next($request);
}
References
- GitHub PR 172: Rule merge fix
- Laravel Validation Docs: `array_merge_recursive` usage
Sources:
Reported By: github.com
Extra Source Hub:
Undercode
