SQL injection vulnerability in the check_user_password function in main/auth/profile.php in Chamilo LMS 1.9.6 and earlier, when using the non-encrypted passwords mode set at installation, allows remote authenticated users to execute arbitrary SQL commands via the "password0" parameter.
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.