#VU51478 Information disclosure in Moodle - CVE-2021-20281

Vulnerability identifier: #VU51478

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-2021-20281

CWE-ID: CWE-200

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 access to personal information of website users.

The vulnerability exists due to output of website users' full names via the online users block. A remote user can obtain full names of other website users.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Moodle: 3.5.0 beta - 3.5.16, 3.6.0 beta - 3.6.10, 3.7.0 beta - 3.7.9, 3.8.0 beta - 3.8.7, 3.9.0 - 3.9.4, 3.10.0 - 3.10.1

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External links
https://moodle.org/mod/forum/discuss.php?d=419652

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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.