4.3

CVSS Score

3.1

-

CVSS Score

Basic Information

CVE ID

CVE-2021-20283

GHSA ID

GHSA-2m72-m5cw-3g9h

EPSS Score

0.51443%

CWE

CWE-862

Published

5/24/2022

Updated

4/23/2024

KEV Status

Technology

PHP

Basic Information

CVE ID

GHSA ID

EPSS Score

CWE

Published

Updated

KEV Status

Technology

Concerned about an active attack path?

Talk to our security experts and see Miggo in action.

Miggo Vulnerability Database

→

CVE-2021-20283

CVE-2021-20283: Missing permission check in Moodle

The web service responsible for fetching other users' enrolled courses did not validate that the requesting user had permission to view that information in each course in moodle before 3.10.2, 3.9.5, 3.8.8, 3.5.17.

(GitHub Advisory)

Miggo Vulnerability Database

→

CVE-2021-20283

CVE-2021-20283:

4.3

CVSS Score

3.1

-

CVSS Score

Basic Information

CVE ID

CVE-2021-20283

GHSA ID

GHSA-2m72-m5cw-3g9h

EPSS Score

0.51443%

CWE

CWE-862

Published

5/24/2022

Updated

4/23/2024

KEV Status

Technology

PHP

Basic Information

CVE ID

GHSA ID

EPSS Score

CWE

Published

Updated

KEV Status

Technology

Technical Details

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
moodle/moodle	composer	>= 3.10.0, < 3.10.2	3.10.2
moodle/moodle	composer	>= 3.9.0, < 3.9.5	3.9.5
moodle/moodle	composer	>= 3.8.0, < 3.8.8	3.8.8
moodle/moodle	composer	< 3.5.17	3.5.17

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability description explicitly mentions a missing permission check in the web service for fetching enrolled courses. In Moodle's architecture:

Enrollment-related web services are typically located in enrol/external.php
The core_enrol_get_users_courses function is the primary endpoint for retrieving user course enrollments
The CWE-862 (Missing Authorization) aligns with missing capability checks for 'moodle/user:viewdetails' in course contexts
The security bulletin MDL-70822 references this exact functionality
Patched versions would have added context-level capability checks within this course iteration logic

Vulnerable functions

Only Mi**o us*rs **n s** t*is s**tion

WAF Protection Rules

WAF Rule

W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.

Reasoning

*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.

4.3

-

Basic Information

Basic Information

Concerned about an active attack path?

CVE-2021-20283: Missing permission check in Moodle

CVE-2021-20283:

4.3

-

Basic Information

Basic Information

Technical Details

Technical Details

Vulnerability IntelligenceMiggo AI

Root Cause Analysis

Vulnerable functions

WAF Protection Rules

WAF Rule

Reasoning

Vulnerability IntelligenceMiggo AI

Vulnerability IntelligenceMiggo AI

Root Cause Analysis

Vulnerable functions

WAF Protection Rules

WAF Rule

Reasoning

CVE-2021-20283: Missing permission check in Moodle

Basic Information

Basic Information

4.3

4.3

Technical Details

Vulnerability Intelligence
Miggo AI

Vulnerability Intelligence
Miggo AI

Vulnerability Intelligence
Miggo AI