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Vulnerability details: VCID-h8s1-p4wb-9bb4
Vulnerability ID VCID-h8s1-p4wb-9bb4
Aliases CVE-2021-40693
GHSA-2jxg-mv2m-j4r7
Summary Moodle type juggling vulnerability An authentication bypass risk was identified in the external database authentication functionality, due to a type juggling vulnerability.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-287 Improper Authentication
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.0008 https://api.first.org/data/v1/epss?cve=CVE-2021-40693
epss 0.0008 https://api.first.org/data/v1/epss?cve=CVE-2021-40693
cvssv3.1 6.5 https://bugzilla.redhat.com/show_bug.cgi?id=2043417
generic_textual MODERATE https://bugzilla.redhat.com/show_bug.cgi?id=2043417
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-2jxg-mv2m-j4r7
cvssv3.1 6.5 https://github.com/moodle/moodle
generic_textual MODERATE https://github.com/moodle/moodle
cvssv3.1 6.5 https://nvd.nist.gov/vuln/detail/CVE-2021-40693
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2021-40693
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2021-40693
https://bugzilla.redhat.com/show_bug.cgi?id=2043417
https://github.com/moodle/moodle
https://nvd.nist.gov/vuln/detail/CVE-2021-40693
cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*
GHSA-2jxg-mv2m-j4r7 https://github.com/advisories/GHSA-2jxg-mv2m-j4r7
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N Found at https://bugzilla.redhat.com/show_bug.cgi?id=2043417
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: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N Found at https://github.com/moodle/moodle
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: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-40693
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
Exploit Prediction Scoring System (EPSS)
Percentile 0.24605
EPSS Score 0.0008
Published At June 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-01T12:23:25.977443+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/09/GHSA-2jxg-mv2m-j4r7/GHSA-2jxg-mv2m-j4r7.json 36.1.3