#VU49969 Improper access control in Moodle - CVE-2021-20184

Vulnerability identifier: #VU49969

Vulnerability risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-20184

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Moodle
Web applications / Other software

Vendor: moodle.org

Description

The vulnerability allows a remote user to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions in grade related web services. A remote user with student access can view grades of other students.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Moodle: 3.8.0 beta - 3.8.6, 3.9.0 - 3.9.3, 3.10.0

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External links
https://moodle.org/mod/forum/discuss.php?d=417167

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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.