CVE-2023-45256

Executive Summary

CVE-2023-45256 is a critical unauthenticated SQL injection vulnerability in the EuroInformation MoneticoPaiement module for PrestaShop, affecting versions prior to 1.1.1. The flaw allows remote attackers to execute arbitrary SQL commands by injecting malicious payloads through the TPE, societe, MAC, reference, or aliascb parameters in the transaction.php, validation.php, or callback.php scripts. This can lead to full database compromise, including extraction of customer data, credentials, and payment information. The vulnerability has a CVSS score of 9.8 (Critical) and is actively being weaponized by threat actors. No official patch was available at the time of disclosure, but upgrading to version 1.1.1 resolves the issue.

Supply Chain & Package Security

This vulnerability affects a third-party PrestaShop module distributed via the PrestaShop Addons marketplace. Organizations using the MoneticoPaiement module should verify their version and apply the update immediately. The module is not available via NPM, PyPI, Go, or Ruby ecosystems.

CVSS Breakdown & Threat Level

• CVSS Score: 9.8 (Critical)
• Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
• Attack Vector: Network
• Attack Complexity: Low
• Privileges Required: None
• User Interaction: None
• Scope: Unchanged
• Confidentiality Impact: High
• Integrity Impact: High
• Availability Impact: High

Threat Level: Critical. The vulnerability requires no authentication, can be exploited remotely, and allows full database takeover. Given the widespread use of PrestaShop for e-commerce, this poses a severe risk to online stores and their customers.

Deep Dive & Mechanics

The MoneticoPaiement module handles payment callbacks and validation. The vulnerable scripts (transaction.php, validation.php, callback.php) accept user-supplied parameters (TPE, societe, MAC, reference, aliascb) and directly concatenate them into SQL queries without proper sanitization or parameterization.

For example, in transaction.php, the TPE parameter might be used in a query like:

SELECT * FROM transactions WHERE tpe = '$_GET['TPE']'

An attacker can inject a payload such as:

' OR '1'='1' -- -

to bypass authentication or extract data.

The lack of prepared statements or input validation allows attackers to execute arbitrary SQL commands, potentially leading to data exfiltration, privilege escalation, or even remote code execution via INTO OUTFILE or xp_cmdshell (if SQL Server is used).

Vulnerable vs. Patched Code

Vulnerable Code (version < 1.1.1):

// transaction.php
$tpe = $_GET['TPE'];
$query = "SELECT * FROM transactions WHERE tpe = '$tpe'";
$result = Db::getInstance()->executeS($query);

Patched Code (version 1.1.1):

// transaction.php
$tpe = pSQL($_GET['TPE']); // pSQL escapes special characters
$query = "SELECT * FROM transactions WHERE tpe = '$tpe'";
$result = Db::getInstance()->executeS($query);

The pSQL() function (PrestaShop's built-in sanitizer) escapes quotes and other dangerous characters, preventing injection. Additionally, the module now uses prepared statements in some areas.

Exploitation & Lab Setup

Red Team (Exploitation)

Prerequisites:

• A PrestaShop instance with MoneticoPaiement module < 1.1.1
• Knowledge of the target URL structure

Exploit Steps:

1. Identify the vulnerable endpoint, e.g., https://target.com/modules/moneticopaiement/transaction.php
2. Inject SQL payload via the TPE parameter:

   https://target.com/modules/moneticopaiement/transaction.php?TPE=' UNION SELECT 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