#VU46836 Improper Authorization in Moodle - CVE-2020-25629

Vulnerability identifier: #VU46836

Vulnerability risk: Medium

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

CVE-ID: CVE-2020-25629

CWE-ID: CWE-285

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Moodle
Web applications / Other software

Vendor: moodle.org

Description

The vulnerability allows a remote user to escalate privileges within the application.

The vulnerability exists due to an error within the "Log in as" feature. A remote user with "Log in as" capability in a course context (typically, course managers) can gain access to some site administration capabilities by "logging in as" a System manager.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Moodle: 3.0 - 3.0.10, 3.1.0 beta - 3.1.18, 3.2.0 beta - 3.2.9, 3.3 - 3.3.9, 3.4.0 beta - 3.4.9, 3.5.0 beta - 3.5.13, 3.6.0 beta - 3.6.10, 3.7.0 beta - 3.7.7, 3.8.0 beta - 3.8.4, 3.9.0 - 3.9.1

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External links
https://moodle.org/mod/forum/discuss.php?d=410841

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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.