Moodle Oauth 2 Insufficiently Protects Against Compromise

published 2020-03-31 6 y ago modified 2026-06-17 4 mo ago also GHSA-rv62-6f56-j83w , EUVD-2022-5232

cvss: 4.8; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.1%; EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits: 0; none known

A vulnerability was found in Moodle versions 3.7 before 3.7.3, 3.6 before 3.6.7, 3.5 before 3.5.9 and earlier. OAuth 2 providers who do not verify users' email address changes require additional verification during sign-up to reduce the risk of account compromise.

Patch / fix

fixed in 2

packagist moodle/moodle 3.5.9, 3.6.7, 3.7.3
moodle moodle 3.5.9, 3.6.7, 3.7.3

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-2019-14880 updated 2025-11-21 cvss 4.8

moodle: Add additional verification for some OAuth 2 logins to prevent account compromise

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

1.11% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.0	4.8	CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
NVD	3.1	9.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
NVD	2.0	6.4	AV:N/AC:L/Au:N/C:P/I:P/A:N
GitHub	3.1	9.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected packages

ecosystem	package	affected	fixed in
packagist	moodle/moodle	>=3.7.0, <3.7.3 >=3.6.0, <3.6.7 >=3.5.0, <3.5.9	3.7.3 3.6.7 3.5.9

Affected products

[UNKNOWN] moodle

Classification

Weakness

CWE-287 Improper Authentication

References

moodle.org /security/
vendor-advisory
bugzilla.redhat.com /show_bug.cgi?id=CVE-2019-14880
web, issue-tracking, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2019-14880
advisory
github.com /moodle/moodle
package

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.

Summary