#VU31682 Permissions, Privileges, and Access Controls in Moodle - CVE-2020-14321

Vulnerability identifier: #VU31682

Vulnerability risk: High

CVSSv4.0: 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/E:A/U:Amber]

CVE-ID: CVE-2020-14321

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Moodle
Web applications / Other software

Vendor: moodle.org

Description

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. 

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Moodle: 3.5.0 - 3.5.12, 3.7.0 - 3.7.6, 3.8.0 - 3.8.3, 3.9.0

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External links
https://moodle.org/mod/forum/discuss.php?d=407393

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.