# Broken Access Control  in `/periodo-lancamento` Endpoint

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## Summary

A **Broken Access Control** vulnerability was identified in the `/periodo-lancamento` endpoint of the _i-educar_ application. This vulnerability allows users without proper permissions to access restricted functionality, bypassing authorization checks.

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## Details

**Vulnerable Endpoint:** `GET /periodo-lancamento`  
**Authentication:** Required

The application fails to properly validate user permissions before granting access to this endpoint. As a result, even low-privileged users can successfully access the functionality intended only for permited users .

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## PoC

1. Authenticate as a non-privileged user.

<img width="1603" height="673" alt="Pasted image 20250914131157" src="https://github.com/user-attachments/assets/3f4e8bcd-e2e8-4468-a57f-d1e631ff934b" />

<img width="936" height="436" alt="Pasted image 20250821191019" src="https://github.com/user-attachments/assets/2caed485-5950-43d1-a8bb-f601322a7c1a" />

    
2. Send the following request::

```
GET /periodo-lancamento HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:128.0) Gecko/20100101 Firefox/128.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate, br, zstd
Connection: keep-alive
Cookie: i_educar_session=[low_privileged cookie]
Upgrade-Insecure-Requests: 1
Sec-Fetch-Dest: document
Sec-Fetch-Mode: navigate
Sec-Fetch-Site: none
Sec-Fetch-User: ?1
Priority: u=0, i
```
    
3. We could observe that we have access to the page and to the function. And, this user, should not do that.

<img width="967" height="657" alt="Pasted image 20250914131656" src="https://github.com/user-attachments/assets/d424e8da-cc81-475f-bd68-b8e52f5ac85d" />


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## Impact

Broken Access Control vulnerabilities can have severe consequences, including:

- Unauthorized access to restricted functionality
    
- Escalation of privileges for low-level users
    
- Exposure of sensitive data and potential system compromise
    
- Loss of confidentiality and integrity of educational records
    
- Reputational damage to the organization
    

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## References

[CVE-2025-11050](https://www.cve.org/CVERecord?id=CVE-2025-11050)

[VulnDB-326087](https://vuldb.com/?id.326087)

[I-Educar – Official Repository](https://github.com/portabilis/i-educar)

## Discoverer

[Marcelo Queiroz](www.linkedin.com/in/marceloqueirozjr) 

by [CVE-Hunters](https://github.com/Sec-Dojo-Cyber-House/cve-hunters)