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Vulnerability details: VCID-gksf-snrk-9qb2
Vulnerability ID VCID-gksf-snrk-9qb2
Aliases CVE-2021-32476
GHSA-4qxc-qxrp-33cw
Summary Moodle denial-of-service risk in the draft files area A denial-of-service risk was identified in the draft files area, due to it not respecting user file upload limits. Moodle versions 3.10 to 3.10.3, 3.9 to 3.9.6, 3.8 to 3.8.8, 3.5 to 3.5.17 and earlier unsupported versions are affected.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (4)
CWE-400 Uncontrolled Resource Consumption
CWE-770 Allocation of Resources Without Limits or Throttling
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 0.00649 https://api.first.org/data/v1/epss?cve=CVE-2021-32476
epss 0.00649 https://api.first.org/data/v1/epss?cve=CVE-2021-32476
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-4qxc-qxrp-33cw
cvssv3.1 7.5 https://github.com/moodle/moodle
generic_textual HIGH https://github.com/moodle/moodle
cvssv3.1 7.5 https://moodle.org/mod/forum/discuss.php?d=422310
generic_textual HIGH https://moodle.org/mod/forum/discuss.php?d=422310
cvssv2 5.0 https://nvd.nist.gov/vuln/detail/CVE-2021-32476
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2021-32476
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2021-32476
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2021-32476
https://github.com/moodle/moodle
https://moodle.org/mod/forum/discuss.php?d=422310
https://nvd.nist.gov/vuln/detail/CVE-2021-32476
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-4qxc-qxrp-33cw https://github.com/advisories/GHSA-4qxc-qxrp-33cw
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 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:N/UI:N/S:U/C:N/I:N/A:H Found at https://moodle.org/mod/forum/discuss.php?d=422310
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:N/C:N/I:N/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2021-32476
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:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-32476
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 0.69799
EPSS Score 0.00649
Published At June 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-01T12:24:56.974871+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/03/GHSA-4qxc-qxrp-33cw/GHSA-4qxc-qxrp-33cw.json 36.1.3