Command injection in `/main/webservices/additional_webservices.php` in Chamilo LMS <= v1.11.20 allows unauthenticated attackers to obtain remote code execution via improper neutralisation of special characters. This is a bypass of CVE-2023-34960.

SQL Injection vulnerability in Chamilo LMS v.1.11 thru v.1.11.20 allows a remote privileged attacker to obtain sensitive information via the import sessions functions.

Cross Site Request Forgery (CSRF) vulnerability in Chamilo v.1.11 thru v.1.11.20 allows a remote authenticated privileged attacker to execute arbitrary code.

Chamilo 1.11.x up to 1.11.20 allows users with admin privilege account to insert XSS in the classes/usergroups management section.

Chamilo 1.11.x up to 1.11.20 allows users with admin privilege account to insert XSS in the skills wheel.

Chamilo 1.11.x up to 1.11.20 allows users with admin privilege account to insert XSS in the session category management section.

Chamilo 1.11.x up to 1.11.20 allows users with admin privilege account to insert XSS in the extra fields management section.

Chamilo 1.11.x up to 1.11.20 allows users with admin privilege account to insert XSS in the careers & promotions management section.

Chamilo 1.11.x up to 1.11.20 allows users with admin privilege account to insert XSS in the course categories' definition.

Chamilo 1.11.x up to 1.11.20 allows users with an admin privilege account to insert XSS in the languages management section.