What is CVE-2016-3731?

CVE-2016-3731 is a medium-severity vulnerability in Moodle, classified under Information Disclosure. CVSS score: 5.3/10. Published 2017-04-20.

How severe is CVE-2016-3731?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Information disclosure in Moodle

CVE-2016-3731

Moodle 3.0 through 3.0.3, 2.9 through 2.9.5, and 2.8 through 2.8.11 allows remote attackers to obtain the names of hidden forums and forum discussions.

Vulnerability class: Information Disclosure

Published 2017-04-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.016 (74.8th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 74.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000

Affected products

Moodle — versions 2.8.0, 2.8.1, 2.8.2

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

www.openwall.com/lists/oss-security/2016/05/17/4 (mailing-list, Mailing List, Third Party Advisory)
bugzilla.redhat.com/show_bug.cgi (Issue Tracking)
www.securitytracker.com/id/1035902 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2016-3731?: CVE-2016-3731 is a medium-severity vulnerability in Moodle, classified under Information Disclosure. CVSS score: 5.3/10. Published 2017-04-20.
How severe is CVE-2016-3731?: Medium severity. CVSS v3 base score is 5.3 out of 10.