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Vulnerability details: VCID-114r-sgm2-57hp
Vulnerability ID VCID-114r-sgm2-57hp
Aliases CVE-2021-20184
GHSA-mm73-86f9-5x5c
Summary Moodle Grade information disclosure in grade's external fetch functions It was found in Moodle before version 3.10.1, 3.9.4 and 3.8.7 that a insufficient capability checks in some grade related web services meant students were able to view other students grades.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-354 Improper Validation of Integrity Check Value
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 0.00202 https://api.first.org/data/v1/epss?cve=CVE-2021-20184
epss 0.00202 https://api.first.org/data/v1/epss?cve=CVE-2021-20184
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-mm73-86f9-5x5c
cvssv3.1 4.3 https://github.com/moodle/moodle
generic_textual MODERATE https://github.com/moodle/moodle
cvssv3.1 4.3 https://moodle.org/mod/forum/discuss.php?d=417167
generic_textual MODERATE https://moodle.org/mod/forum/discuss.php?d=417167
cvssv2 4.0 https://nvd.nist.gov/vuln/detail/CVE-2021-20184
cvssv3.1 4.3 https://nvd.nist.gov/vuln/detail/CVE-2021-20184
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2021-20184
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2021-20184
https://github.com/moodle/moodle
https://moodle.org/mod/forum/discuss.php?d=417167
https://nvd.nist.gov/vuln/detail/CVE-2021-20184
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-mm73-86f9-5x5c https://github.com/advisories/GHSA-mm73-86f9-5x5c
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/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:L/I:N/A:N Found at https://moodle.org/mod/forum/discuss.php?d=417167
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: AV:N/AC:L/Au:S/C:P/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-20184
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-20184
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 0.42761
EPSS Score 0.00202
Published At June 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-01T12:30:22.916650+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/05/GHSA-mm73-86f9-5x5c/GHSA-mm73-86f9-5x5c.json 36.1.3