Moodle 2.1.x before 2.1.6 and 2.2.x before 2.2.3 allows remote authenticated users to bypass the moodle/site:readallmessages capability requirement and read arbitrary messages by using the Recent conversations feature with a modified parameter in a URL.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Moodle | Moodle | 2.1.0 (including) | 2.1.0 (including) |
| Moodle | Moodle | 2.1.1 (including) | 2.1.1 (including) |
| Moodle | Moodle | 2.1.2 (including) | 2.1.2 (including) |
| Moodle | Moodle | 2.1.3 (including) | 2.1.3 (including) |
| Moodle | Moodle | 2.1.4 (including) | 2.1.4 (including) |
| Moodle | Moodle | 2.1.5 (including) | 2.1.5 (including) |