Headline
GHSA-345q-9jmq-g9q4: Moodle allows unauthenticated REST API user data exposure
A flaw has been identified in Moodle where, on certain sites, unauthenticated users could retrieve sensitive user data—including names, contact information, and hashed passwords—via stack traces returned by specific API calls. Sites where PHP is configured with zend.exception_ignore_args = ‘On’ or zend.exception_ignore_args = 1 in the relevant php.ini file are NOT affected by this vulnerability. Sites that do not have the zend.exception_ignore_args setting enabled and are using the internal Moodle LMS authentication system are affected by this vulnerability.
Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.