#VU73867 Information disclosure in Moodle - CVE-2023-28336

Vulnerability identifier: #VU73867

Vulnerability risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-28336

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 attacker to gain access to potentially sensitive information.

The vulnerability exists due to insufficient filtering of grade report history. A remote user can access the names of users they could not otherwise access.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Moodle: 3.9.0 - 3.9.19, 3.11 - 3.11.12, 4.0.0 - 4.0.6, 4.1.0 - 4.1.1

---

External links
https://moodle.org/mod/forum/discuss.php?d=445068
https://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-76809

---

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.