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Vulnerability details: VCID-rwbv-kmw8-bycg
Vulnerability ID VCID-rwbv-kmw8-bycg
Aliases CVE-2021-36395
GHSA-273w-7fxj-pcp6
Summary Moodle vulnerable to Uncontrolled Resource Consumption In Moodle, the file repository's URL parsing required additional recursion handling to mitigate the risk of recursion denial of service.
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-674 Uncontrolled Recursion
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
epss 0.00195 https://api.first.org/data/v1/epss?cve=CVE-2021-36395
epss 0.00195 https://api.first.org/data/v1/epss?cve=CVE-2021-36395
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-273w-7fxj-pcp6
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=424801
generic_textual HIGH https://moodle.org/mod/forum/discuss.php?d=424801
ssvc Track https://moodle.org/mod/forum/discuss.php?d=424801
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2021-36395
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2021-36395
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2021-36395
https://github.com/moodle/moodle
https://moodle.org/mod/forum/discuss.php?d=424801
https://nvd.nist.gov/vuln/detail/CVE-2021-36395
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-273w-7fxj-pcp6 https://github.com/advisories/GHSA-273w-7fxj-pcp6
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=424801
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:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-03-07T19:01:39Z/ Found at https://moodle.org/mod/forum/discuss.php?d=424801
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-2021-36395
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 0.41861
EPSS Score 0.00195
Published At June 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-01T12:15:06.553180+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/03/GHSA-273w-7fxj-pcp6/GHSA-273w-7fxj-pcp6.json 36.1.3