Permissions, Privileges, and Access Controls in Moodle - CVE-2020-14321
Published: July 20, 2020 / Updated: November 25, 2021
Vulnerability identifier: #VU31682
CSH Severity: High
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-14321
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vulnerability details
The vulnerability allows a remote attacker to escalate privileges on the system.
The vulnerability exists due to application does not properly impose security restrictions within ourse enrolments. A remote authenticated attacker with teacher permission can escalate privileges from teacher role into manager role.
Affected software
Moodle
How to mitigate CVE-2020-14321
Install updates from vendor's website.
Moodle - addressed in versions 3.5.13, 3.7.7, 3.8.4, 3.9.1
Links to Public Exploits and PoC-codes
- Exploit #7068 - Moodle 3.9 - Remote Code Execution (RCE) (Authenticated) (November 25, 2021)
- Exploit #6870 - Moodle Teacher Enrollment Privilege Escalation to RCE (October 12, 2021)
- Exploit #5517 - Moodle_3.9_RCE_AutoPwn (AutoPwn Script for Moodle 3.9 leveraging CVE-2020–20282, CVE-2020–14320,CVE-2020–14321) (June 1, 2021)
- Exploit #5329 - CVE-2020-14321 (Python script to exploit CVE-2020-14321 - Moodle 3.9 - Course enrollments allowed privilege escalation from teacher role into manager role to RCE.) (April 30, 2021)
- Exploit #3608 - CVE-2020-14321 (Course enrolments allowed privilege escalation from teacher role into manager role to RCE) (July 28, 2020)