What is CVE-2018-16971?

CVE-2018-16971 is a medium-severity vulnerability in Wisetail Learning Management System, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2018-09-12.

How severe is CVE-2018-16971?

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

Auth bypass in Wisetail Learning Management System

CVE-2018-16971

Wisetail Learning Ecosystem (LE) through v4.11.6 allows insecure direct object reference (IDOR) attacks to access non-purchased course contents (quiz / test) via a modified id parameter.

Vulnerability class: IDOR (Insecure Direct Object Reference)

Published 2018-09-12 · 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: 0.006 (49.2th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 49.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Wisetail Learning Management System

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

blog.ziaurrashid.com/wisetail-learning-ecosystem-multiple-idor-vunlerability/ (Technical Description, Exploit)

Frequently asked questions

What is CVE-2018-16971?: CVE-2018-16971 is a medium-severity vulnerability in Wisetail Learning Management System, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2018-09-12.
How severe is CVE-2018-16971?: Medium severity. CVSS v3 base score is 4.3 out of 10.