CVE-2026-33714
Received Received - Intake
SQL Injection in Chamilo LMS Statistics AJAX Allows Data Extraction

Publication date: 2026-04-14

Last updated on: 2026-04-23

Assigner: GitHub, Inc.

Description
Chamilo is an open-source learning management system (LMS). Version 2.0.0-RC.2 contains a SQL Injection vulnerability in the statistics AJAX endpoint, which is an incomplete fix for CVE-2026-30881. While CVE-2026-30881 was patched by applying Security::remove_XSS() to the date_start and date_end parameters in the get_user_registration_by_month action, the same parameters remain unsanitized in the users_active action within the same file (public/main/inc/ajax/statistics.ajax.php), where they are directly interpolated into a SQL query. An authenticated admin can exploit this to perform time-based blind SQL injection, enabling extraction of arbitrary data from the database. This issue has been fixed in version 2.0.0.
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Meta Information
Published
2026-04-14
Last Modified
2026-04-23
Generated
2026-06-16
AI Q&A
2026-04-15
EPSS Evaluated
2026-06-15
NVD
CVE-2026-33714
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
chamilo chamilo_lms 2.0.0
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-89 The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data.
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Executive Summary

This vulnerability exists in Chamilo version 2.0.0-RC.2, an open-source learning management system. It is a SQL Injection flaw found in the statistics AJAX endpoint. Specifically, the date_start and date_end parameters in the users_active action are not properly sanitized and are directly used in a SQL query. An authenticated admin can exploit this to perform a time-based blind SQL injection, allowing them to extract arbitrary data from the database.

This issue is a partial fix failure from a previous vulnerability (CVE-2026-30881), where only one action was properly sanitized but the other remained vulnerable.

Impact Analysis

An attacker with authenticated admin access can exploit this vulnerability to perform time-based blind SQL injection attacks. This allows the attacker to extract arbitrary data from the database, potentially exposing sensitive information.

Such unauthorized data extraction can lead to data breaches, loss of data integrity, and compromise of the system's confidentiality.

Mitigation Strategies

To mitigate this vulnerability, you should upgrade Chamilo to version 2.0.0 or later, where the issue has been fixed.

Ensure that only authenticated administrators have access to the vulnerable AJAX endpoint to reduce risk.

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