What is CVE-2017-7531?

CVE-2017-7531 is a medium-severity vulnerability in Moodle, classified under Information Disclosure. CVSS score: 4.3/10. Published 2017-07-17.

How severe is CVE-2017-7531?

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

Information disclosure in Moodle

CVE-2017-7531

In Moodle 3.3, the course overview block reveals activities in hidden courses.

Vulnerability class: Information Disclosure

Published 2017-07-17 · 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: 0.009 (58.6th percentile), scored 2026-10-07.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 58.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Moodle — versions 3.3.0

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

moodle.org/mod/forum/discuss.php (Patch, Vendor Advisory)
www.securityfocus.com/bid/99618 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2017-7531?: CVE-2017-7531 is a medium-severity vulnerability in Moodle, classified under Information Disclosure. CVSS score: 4.3/10. Published 2017-07-17.
How severe is CVE-2017-7531?: Medium severity. CVSS v3 base score is 4.3 out of 10.