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Vulnerability details: VCID-fz5m-54ja-sbg4
Vulnerability ID VCID-fz5m-54ja-sbg4
Aliases CVE-2024-33999
GHSA-r2wx-46gp-rp3h
Summary Moodle Improper Input Validation Unsafe direct use of $_SERVER['HTTP_REFERER'] in admin/tool/mfa/index.php. The referrer URL used by MFA required additional sanitizing, rather than being used directly.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-20 Improper Input Validation
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
generic_textual HIGH http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-80878
epss 0.00808 https://api.first.org/data/v1/epss?cve=CVE-2024-33999
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-r2wx-46gp-rp3h
generic_textual HIGH https://github.com/moodle/moodle
cvssv3.1 9.8 https://moodle.org/mod/forum/discuss.php?d=458387
generic_textual HIGH https://moodle.org/mod/forum/discuss.php?d=458387
ssvc Track* https://moodle.org/mod/forum/discuss.php?d=458387
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2024-33999
Reference id Reference type URL
http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-80878
https://api.first.org/data/v1/epss?cve=CVE-2024-33999
https://github.com/moodle/moodle
https://moodle.org/mod/forum/discuss.php?d=458387
CVE-2024-33999 https://nvd.nist.gov/vuln/detail/CVE-2024-33999
GHSA-r2wx-46gp-rp3h https://github.com/advisories/GHSA-r2wx-46gp-rp3h
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://moodle.org/mod/forum/discuss.php?d=458387
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:Y/T:T/P:M/B:A/M:M/D:R/2024-08-13T19:55:30Z/ Found at https://moodle.org/mod/forum/discuss.php?d=458387
Exploit Prediction Scoring System (EPSS)
Percentile 0.74593
EPSS Score 0.00808
Published At June 5, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-04T16:21:50.210082+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/packagist/moodle/moodle/CVE-2024-33999.yml 38.6.0