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githubGitHub Advisory DatabaseGHSA-6R7X-6Q98-QCQP
HistoryMay 13, 2022 - 1:12 a.m.

Moodle does not set the RISK_XSS bit for graders

2022-05-1301:12:45
CWE-79
GitHub Advisory Database
github.com
5
moodle
risk_xss
graders
quiz grading
software
cross-site scripting

CVSS2

3.5

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

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

AI Score

5.4

Confidence

High

EPSS

0.002

Percentile

54.0%

mod/quiz/db/access.php in Moodle through 2.5.9, 2.6.x before 2.6.11, 2.7.x before 2.7.8, and 2.8.x before 2.8.6 does not set the RISK_XSS bit for graders, which allows remote authenticated users to conduct cross-site scripting (XSS) attacks via crafted gradebook feedback during manual quiz grading.

Affected configurations

Vulners
Node
moodlemoodleRange2.8.02.8.6
OR
moodlemoodleRange2.7.02.7.8
OR
moodlemoodleRange<2.6.11
VendorProductVersionCPE
moodlemoodle*cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*

CVSS2

3.5

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

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

AI Score

5.4

Confidence

High

EPSS

0.002

Percentile

54.0%