What is CVE-2017-12157?

CVE-2017-12157 is a medium-severity vulnerability in Moodle, classified under Information Disclosure. CVSS score: 4.3/10. Published 2017-09-18.

How severe is CVE-2017-12157?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Information disclosure in Moodle

CVE-2017-12157

In Moodle 3.x, various course reports allow teachers to view details about users in the groups they can't access.

Vulnerability class: Information Disclosure

Published 2017-09-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.010 (60.7th percentile), scored 2026-10-07.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 60.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Moodle — versions 3.0.0, 3.0.1, 3.0.2
Moodle 3.x — versions Moodle 3.x

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

www.securityfocus.com/bid/100848 (VDB Entry, Third Party Advisory, vdb-entry)
moodle.org/mod/forum/discuss.php (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2017-12157?: CVE-2017-12157 is a medium-severity vulnerability in Moodle, classified under Information Disclosure. CVSS score: 4.3/10. Published 2017-09-18.
How severe is CVE-2017-12157?: Medium severity. CVSS v3 base score is 4.3 out of 10.