CVE-2026-34239
HighCVSS 7.5Exploitation Probability (EPSS)
Low risk21th percentile - higher than 21% of all known CVEs
Summary
Vulnerability in Chamilo version 1.11.40 and earlier. An authenticated user enrolled in a course (student, teacher, DRH) can remotely execute code in the main/inc/ajax/lang.ajax.php path, which is protected only by api_protect_course_script(true).
Risk Assessment
An attacker can execute arbitrary code on the server, leading to full system compromise and data loss.
Recommendation
Update Chamilo to a version newer than 1.11.40. Restrict access to the lang.ajax.php endpoint to trusted users only.
Other vulnerabilities in Chamilo
See all- CVE-2023-34960Critical
A command injection vulnerability in the wsConvertPpt component of Chamilo versions 1.11.* through 1.11.18. An attacker can execute arbitrary system commands via a SOAP API call with a crafted PowerPoint filename.
- CVE-2023-34944Critical
An arbitrary file upload vulnerability in the /fileUpload.lib.php component of Chamilo versions 1.11.* up to 1.11.18 allows attackers to upload crafted SVG files. This can lead to arbitrary code execution on the server.
- CVE-2026-33714High
Chamilo LMS version 2.0.0-RC.2 has a SQL injection vulnerability in the statistics AJAX endpoint, an incomplete fix for CVE-2026-30881. The date_start and date_end parameters in the users_active action are unsanitized, allowing an authenticated admin to perform time-based blind SQL injection and extract arbitrary data.
- CVE-2023-39061Low
A CSRF vulnerability in Chamilo versions 1.11 through 1.11.20 allows a remote authenticated privileged attacker to execute arbitrary code. The flaw is due to missing cross-site request forgery protections.
- CVE-2023-37066Medium
Chamilo versions 1.11.x up to 1.11.20 allow users with admin privileges to insert XSS in the skills wheel.
- CVE-2023-37062Medium
Chamilo versions 1.11.x up to 1.11.20 allow users with admin privilege accounts to insert XSS in the course categories' definition.
Original NVD description (English source)
Chamilo version 1.11.40 and earlier are vulnerable to authenticated remote code execution in the main/inc/ajax/lang.ajax.php path. This endpoint is protected only by `api_protect_course_script(true)`, which means any authenticated user enrolled in a course (student, teacher, DRH) can reach it.