Recently, a critical SQL injection vulnerability has been discovered in the EU Cookie Law GDPR (Banner + Blocker) module before 2.1.3 for PrestaShop. This security flaw allows a potential attacker to inject malicious SQL queries and gain unauthorized access to the web application. The vulnerability is caused by the inadequate input validation of cookies (lgcookieslaw or __lglaw) which can be exploited to perform unauthorized actions including data leakage, modification, and even complete system compromise.


Common Vulnerabilities and Exposures (CVE) is an international open-source database that assigns unique identification numbers to publicly known information security vulnerabilities. The CVE-ID for this discovered vulnerability is CVE-2022-44727.

Affected Versions

The EU Cookie Law GDPR (Banner + Blocker) module versions affected by this security flaw are before 2.1.3 for PrestaShop.

Exploit Details

An attacker needs to manipulate the lgcookieslaw or __lglaw cookies being sent by the client browser to the server by injecting malicious SQL queries. The web application can unintentionally execute these SQL queries, leading to a successful SQL injection attack.

Code Snippet

The following code snippet demonstrates one way an attacker could potentially exploit the SQL injection vulnerability by injecting a malicious payload into the affected lgcookieslaw cookie:

GET /path/to/webapp HTTP/1.1
Cookie: lgcookieslaw=' UNION SELECT 1, @@VERSION, 3, 4, 5 -- -

This example highlights an attempt to extract the server's database version by injecting the SQL UNION SELECT query along with the @@VERSION system variable into the lgcookieslaw cookie.

Original References

1. National Vulnerability Database (NVD):
2. PrestaShop Official Security Advisory:

Mitigation and Fixes

To mitigate the risk of this security vulnerability, it is highly recommended to upgrade the EU Cookie Law GDPR (Banner + Blocker) module to version 2.1.3 or later.

Moreover, implementing proper input validation and sanitization mechanisms, such as prepared statements or parameterized queries, can help reduce the risk of SQL injection attacks to a great extent. Applications should also leverage Content Security Policy (CSP) and security-related headers to enforce strict security policies.


It is crucial for web developers and administrators to stay updated about security vulnerabilities affecting their web applications and underlying components. The CVE-2022-44727 vulnerability in PrestaShop's EU Cookie Law GDPR (Banner + Blocker) module is a critical security risk that should be addressed immediately by updating to the latest, patched version of the module. Moreover, it is also essential to follow secure coding practices and maintain a well-defined security strategy for mitigating threats like these in the future.


Published on: 11/10/2022 17:15:00 UTC
Last modified on: 11/15/2022 19:13:00 UTC