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Vulnerability details: VCID-j6p2-cxjq-1qb1
Vulnerability ID VCID-j6p2-cxjq-1qb1
Aliases CVE-2021-36396
GHSA-4rmj-w58m-fvch
Summary Moodle vulnerable to Server-Side Request Forgery In Moodle, insufficient redirect handling made it possible to blindly bypass cURL blocked hosts/allowed ports restrictions, resulting in a blind SSRF risk.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-918 Server-Side Request Forgery (SSRF)
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 0.00764 https://api.first.org/data/v1/epss?cve=CVE-2021-36396
epss 0.00764 https://api.first.org/data/v1/epss?cve=CVE-2021-36396
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-4rmj-w58m-fvch
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=424802
generic_textual HIGH https://moodle.org/mod/forum/discuss.php?d=424802
ssvc Track https://moodle.org/mod/forum/discuss.php?d=424802
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2021-36396
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2021-36396
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2021-36396
https://github.com/moodle/moodle
https://moodle.org/mod/forum/discuss.php?d=424802
https://nvd.nist.gov/vuln/detail/CVE-2021-36396
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-4rmj-w58m-fvch https://github.com/advisories/GHSA-4rmj-w58m-fvch
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/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:N/UI:N/S:U/C:N/I:H/A:N Found at https://moodle.org/mod/forum/discuss.php?d=424802
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:Y/T:P/P:M/B:A/M:M/D:T/2025-03-05T15:47:31Z/ Found at https://moodle.org/mod/forum/discuss.php?d=424802
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-36396
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 0.72393
EPSS Score 0.00764
Published At June 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-01T12:15:18.202947+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/03/GHSA-4rmj-w58m-fvch/GHSA-4rmj-w58m-fvch.json 36.1.3