#VU40273 Permissions, Privileges, and Access Controls in Moodle - CVE-2016-2155

Vulnerability identifier: #VU40273

Vulnerability risk: Low

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

CVE-ID: CVE-2016-2155

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Moodle
Web applications / Other software

Vendor: moodle.org

Description

The vulnerability allows a remote authenticated user to manipulate data.

The grade-reporting feature in Singleview (aka Single View) in Moodle 2.8.x before 2.8.11, 2.9.x before 2.9.5, and 3.0.x before 3.0.3 does not consider the moodle/grade:manage capability, which allows remote authenticated users to modify "Exclude grade" settings by leveraging the Non-Editing Instructor role.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Moodle: 2.8 - 2.8.10, 2.9 - 2.9.4, 3.0 - 3.0.2

---

External links
https://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-52378
https://www.openwall.com/lists/oss-security/2016/03/21/1
https://www.securitytracker.com/id/1035333
https://moodle.org/mod/forum/discuss.php?d=330177

---

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.