course/loginas.php in Moodle through 2.2.11, 2.3.x before 2.3.11, 2.4.x before 2.4.8, 2.5.x before 2.5.4, and 2.6.x before 2.6.1 does not enforce the moodle/site:accessallgroups capability requirement for outside-group users in a SEPARATEGROUPS configuration, which allows remote authenticated users to perform login as actions via a direct request.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Moodle | Moodle | 2.6.0 (including) | 2.6.0 (including) |
| Moodle | Ubuntu | lucid | * |
| Moodle | Ubuntu | precise | * |
| Moodle | Ubuntu | quantal | * |
| Moodle | Ubuntu | raring | * |
| Moodle | Ubuntu | saucy | * |
| Moodle | Ubuntu | upstream | * |