What is CVE-2019-3849?

CVE-2019-3849 is a high-severity vulnerability in Moodle, classified under Improper Authorization. CVSS score: 8.8/10. Published 2019-03-26.

How severe is CVE-2019-3849?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2019-3849 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in Moodle

CVE-2019-3849

A vulnerability was found in moodle before versions 3.6.3, 3.5.5 and 3.4.8. Users could assign themselves an escalated role within courses or content accessed via LTI, by modifying the request to the LTI publisher site.

Published 2019-03-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (62.3th percentile), scored 2026-10-05.

Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 62.3% 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
[Unknown] Moodle — versions 3.6.3, 3.5.5, 3.4.8

Weakness classification (CWE)

Public proof-of-concept exploits

jev770/badmoodle-scan

References

bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
moodle.org/mod/forum/discuss.php (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2019-3849?: CVE-2019-3849 is a high-severity vulnerability in Moodle, classified under Improper Authorization. CVSS score: 8.8/10. Published 2019-03-26.
How severe is CVE-2019-3849?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2019-3849 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.