CVE-2025-11049

Executive Summary

CVE-2025-11049 is a publicly disclosed vulnerability in Portabilis i-Educar, an open-source educational management system. The flaw resides in the /unificacao-aluno endpoint and involves improper authorization (CWE-285). An unauthenticated remote attacker can exploit this to perform unauthorized actions, potentially leading to data manipulation or access to sensitive student unification features. The CVSS score of 6.3 (Medium) reflects the lack of required privileges and the potential for partial confidentiality, integrity, and availability impact. The exploit is public, increasing the urgency for mitigation.

Supply Chain & Package Security

This vulnerability is not related to a package manager (NPM, PyPI, Go, Ruby). It is a direct web application vulnerability in the i-Educar PHP application.

CVSS Breakdown & Threat Level

• CVSS Score: 6.3 (Medium)
• Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
• Attack Vector (AV): Network (N) - Exploitable remotely.
• Attack Complexity (AC): Low (L) - No special conditions required.
• Privileges Required (PR): None (N) - No authentication needed.
• User Interaction (UI): None (N) - No user action required.
• Scope (S): Unchanged (U) - Impact confined to the vulnerable component.
• Confidentiality (C): Low (L) - Limited data exposure.
• Integrity (I): Low (L) - Limited data modification.
• Availability (A): Low (L) - Limited service disruption.

Threat Level: Medium. The public exploit and low attack complexity make this a realistic threat for unpatched instances.

Deep Dive & Mechanics

The vulnerability is an improper authorization check in the /unificacao-aluno endpoint. This endpoint is likely used for merging or unifying student records. The flaw allows an attacker to bypass authorization controls, potentially performing actions such as:

• Accessing or modifying student unification data without proper permissions.
• Manipulating student records by forging requests to the endpoint.
• Exploiting the lack of access control to trigger unintended state changes in the application.

The exact mechanism involves sending crafted HTTP requests to /unificacao-aluno without a valid session or with insufficient privileges. The application fails to verify that the requesting user has the right to perform the operation, leading to unauthorized execution.

Vulnerable vs. Patched Code

Since no patch details are available, a generic comparison is provided based on the vulnerability type.

Vulnerable Code (Conceptual):

// No authorization check
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $studentId = $_POST['student_id'];
    // Process unification without verifying user permissions
    $result = unifyStudent($studentId);
}

Patched Code (Conceptual):

// Authorization check added
session_start();
if (!isset($_SESSION['user']) || !$_SESSION['user']->hasPermission('unify_student')) {
    http_response_code(403);
    die('Forbidden');
}

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $studentId = $_POST['student_id'];
    // Process unification after authorization
    $result = unifyStudent($studentId);
}

The patch would involve adding a permission check before processing the request, ensuring only authorized users can access the functionality.

Exploitation & Lab Setup

Red Team (Offensive)

Prerequisites:

• A vulnerable instance of i-Educar (version 2.10 or earlier).
• Network access to the target.

Exploitation Steps:

1. Identify the target i-Educar instance.
2. Send a crafted POST request to /unificacao-aluno with arbitrary parameters.
3. Observe unauthorized access or manipulation.

Example Exploit (using curl):

curl -X POST http://target-educar/unificacao-aluno \
  -d "student_id=123&action=merge"

Note: The exact parameters required may vary. The exploit is public, so refer to published PoC for specifics.

Blue Team (Defensive)

Detection:

• Monitor HTTP requests to /unificacao-aluno from unauthenticated users.
• Alert on unusual POST requests to this endpoint without a valid session cookie.
• Review application logs for 403 errors (if patched) or successful unauthorized access.

Hunting:

• Search for requests to /unificacao-aluno with missing or invalid session tokens.
• Correlate with other suspicious activities like brute-force attempts.

Indicators of Compromise (IOCs)

• Network:
  • HTTP POST requests to /unificacao-aluno without a valid session cookie.
  • Unusual parameters in POST body to the endpoint.
• Logs:
  • Access log entries for /unificacao-aluno with HTTP 200 status from unknown IPs.
  • Application error logs related to student unification without authorization.
• File System:
  • Modified student records in the database without corresponding audit trail.

Detection Engineering

YARA Rule

rule Detect_iEducar_Unauthorized_Access {
    meta:
        description = "Detects unauthorized access attempts to i-Educar /unificacao-aluno endpoint"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-11049"
    strings:
        $endpoint = "/unificacao-aluno"
        $post_method = "POST"
    condition:
        $endpoint and $post_method
}

Sigma Rule

title: Unauthorized Access to i-Educar Unification Endpoint
id: 12345678-1234-1234-1234-123456789012
status: experimental
description: Detects HTTP POST requests to /unificacao-aluno without proper authentication
author: Valters IT
date: 2025-04-10
logsource:
    category: webserver
    product: apache
detection:
    selection:
        cs-method: 'POST'
        cs-uri-stem: '/unificacao-aluno'
    condition: selection
falsepositives:
    - Legitimate admin actions
level: medium

Suricata Rule

alert http any any -> any any (
    msg:"CVE-2025-11049 - i-Educar Unauthorized Access to /unificacao-aluno";
    flow:to_server;
    http.method; content:"POST";
    http.uri; content:"/unificacao-aluno";
    classtype:attempted-admin;
    sid:1000001;
    rev:1;
)

Remediation & Mitigation

Immediate Actions:

1. Isolate the vulnerable i-Educar instance from the internet if possible.
2. Apply any available patches from Portabilis (check for updates).
3. Implement a Web Application Firewall (WAF) rule to block requests to /unificacao-aluno from unauthenticated users.

Long-term Fix:

• Upgrade to a patched version of i-Educar once available.
• Conduct a code review to ensure proper authorization checks are in place for all sensitive endpoints.
• Implement role-based access control (RBAC) for all administrative functions.

Workaround:

• Disable the /unificacao-aluno endpoint by modifying the web server configuration (e.g., Apache .htaccess):

<Location "/unificacao-aluno">
    Require all denied
</Location>

Valters IT
Securing Digital Frontiers