mod/chat/chat_ajax.php in Moodle through 2.3.11, 2.4.x before 2.4.9, 2.5.x before 2.5.5, and 2.6.x before 2.6.2 does not properly check for the mod/chat:chat capability during chat sessions, which allows remote authenticated users to bypass intended access restrictions in opportunistic circumstances by remaining in a chat session after an intra-session capability removal by an administrator.
2014-03-24T14:20:39.370
2025-04-12T10:46:40.837
Deferred
CVSSv2: 4.9 (MEDIUM)
AV:N/AC:M/Au:S/C:P/I:P/A:N
6.8
4.9
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | moodle | moodle | ≤ 2.3.11 | Yes |
| Application | moodle | moodle | 2.0.0 | Yes |
| Application | moodle | moodle | 2.0.1 | Yes |
| Application | moodle | moodle | 2.0.2 | Yes |
| Application | moodle | moodle | 2.0.3 | Yes |
| Application | moodle | moodle | 2.0.4 | Yes |
| Application | moodle | moodle | 2.0.5 | Yes |
| Application | moodle | moodle | 2.0.6 | Yes |
| Application | moodle | moodle | 2.0.7 | Yes |
| Application | moodle | moodle | 2.0.8 | Yes |
| Application | moodle | moodle | 2.0.9 | Yes |
| Application | moodle | moodle | 2.1.0 | Yes |
| Application | moodle | moodle | 2.1.1 | Yes |
| Application | moodle | moodle | 2.1.2 | Yes |
| Application | moodle | moodle | 2.1.3 | Yes |
| Application | moodle | moodle | 2.1.4 | Yes |
| Application | moodle | moodle | 2.1.5 | Yes |
| Application | moodle | moodle | 2.1.6 | Yes |
| Application | moodle | moodle | 2.1.7 | Yes |
| Application | moodle | moodle | 2.1.8 | Yes |
| Application | moodle | moodle | 2.1.9 | Yes |
| Application | moodle | moodle | 2.1.10 | Yes |
| Application | moodle | moodle | 2.2.0 | Yes |
| Application | moodle | moodle | 2.2.1 | Yes |
| Application | moodle | moodle | 2.2.2 | Yes |
| Application | moodle | moodle | 2.2.3 | Yes |
| Application | moodle | moodle | 2.2.4 | Yes |
| Application | moodle | moodle | 2.2.5 | Yes |
| Application | moodle | moodle | 2.2.6 | Yes |
| Application | moodle | moodle | 2.2.7 | Yes |
| Application | moodle | moodle | 2.2.8 | Yes |
| Application | moodle | moodle | 2.2.9 | Yes |
| Application | moodle | moodle | 2.2.10 | Yes |
| Application | moodle | moodle | 2.2.11 | Yes |
| Application | moodle | moodle | 2.3.0 | Yes |
| Application | moodle | moodle | 2.3.1 | Yes |
| Application | moodle | moodle | 2.3.2 | Yes |
| Application | moodle | moodle | 2.3.3 | Yes |
| Application | moodle | moodle | 2.3.4 | Yes |
| Application | moodle | moodle | 2.3.5 | Yes |
| Application | moodle | moodle | 2.3.6 | Yes |
| Application | moodle | moodle | 2.3.7 | Yes |
| Application | moodle | moodle | 2.3.8 | Yes |
| Application | moodle | moodle | 2.3.9 | Yes |
| Application | moodle | moodle | 2.3.10 | Yes |
| Application | moodle | moodle | 2.4.0 | Yes |
| Application | moodle | moodle | 2.4.1 | Yes |
| Application | moodle | moodle | 2.4.2 | Yes |
| Application | moodle | moodle | 2.4.3 | Yes |
| Application | moodle | moodle | 2.4.4 | Yes |
| Application | moodle | moodle | 2.4.5 | Yes |
| Application | moodle | moodle | 2.4.6 | Yes |
| Application | moodle | moodle | 2.4.7 | Yes |
| Application | moodle | moodle | 2.4.8 | Yes |
| Application | moodle | moodle | 2.5.0 | Yes |
| Application | moodle | moodle | 2.5.1 | Yes |
| Application | moodle | moodle | 2.5.2 | Yes |
| Application | moodle | moodle | 2.5.3 | Yes |
| Application | moodle | moodle | 2.5.4 | Yes |
| Application | moodle | moodle | 2.6.0 | Yes |
| Application | moodle | moodle | 2.6.1 | Yes |