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githubGitHub Advisory DatabaseGHSA-F9M9-494R-W36P
HistoryMay 13, 2022 - 1:12 a.m.

Moodle allows bypass of intended access restrictions

2022-05-1301:12:50
GitHub Advisory Database
github.com
9
moodle
chat_ajax.php
access restrictions
bypass
remote authenticated users
intra-session
capability removal
administrator

CVSS2

4.9

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

SINGLE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:S/C:P/I:P/A:N

AI Score

6.4

Confidence

Low

EPSS

0.001

Percentile

46.7%

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.

Affected configurations

Vulners
Node
moodlemoodleRange<2.6.2
OR
moodlemoodleRange<2.5.5
OR
moodlemoodleRange<2.4.9

CVSS2

4.9

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

SINGLE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:S/C:P/I:P/A:N

AI Score

6.4

Confidence

Low

EPSS

0.001

Percentile

46.7%