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Fencer Vulns
medium 6.3

CVE-2019-3849 json

Moodle Users could elevate their role when accessing the LTI tool on a provider site

published 2019-03-26 7 y ago modified 2026-06-17 4 mo ago also GHSA-5wg9-5w3f-hxmh , EUVD-2022-2666

cvss
6.3
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 63%
public exploits
0
none known

Summary

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.

Patch / fix

  • packagist moodle/moodle 3.4.8, 3.5.5, 3.6.3
  • moodle moodle 3.4.8, 3.5.5, 3.6.3

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-3849 updated cvss 6.3

moodle: Users could elevate their role when accessing the LTI tool on a provider site

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.02% chance of exploitation in the next 30 days, higher than 63% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.0 6.3 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.5 AV:N/AC:L/Au:S/C:P/I:P/A:P
GitHub 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
packagist moodle/moodle
<3.4.8
>=3.5, <3.5.5
>=3.6, <3.6.3
3.4.8
3.5.5
3.6.3

Affected products

  • [UNKNOWN] moodle

Classification

Weakness
  • CWE-285 Improper Authorization
  • CWE-269 Improper Privilege Management

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.