CVE-2021-36396 - Vulnerability Details - OpenCVE

In Moodle, insufficient redirect handling made it possible to blindly bypass cURL blocked hosts/allowed ports restrictions, resulting in a blind SSRF risk.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable yes

Technical Impact partial

Vendors	Products
Moodle	Moodle

Configuration 1 [-]

OR	cpe:2.3:a:moodle:moodle::::::::
	cpe:2.3:a:moodle:moodle::::::::
	cpe:2.3:a:moodle:moodle::::::::

No data.

References

Link	Providers
https://moodle.org/mod/forum/discuss.php?d=424802

History

Wed, 05 Mar 2025 16:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

MITRE

Status: PUBLISHED

Assigner: fedora

Published: 2023-03-06T00:00:00.000Z

Updated: 2025-03-05T15:49:42.195Z

Reserved: 2021-07-12T00:00:00.000Z

Link: CVE-2021-36396

Vulnrichment

Updated: 2024-08-04T00:54:51.476Z

NVD

Status : Modified

Published: 2023-03-06T21:15:10.577

Modified: 2025-03-05T16:15:35.433

Link: CVE-2021-36396

Redhat

No data.

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*", "matchCriteriaId": "6ED9E7B8-EAD3-4BE3-BC62-E2B9926EE426", "versionEndExcluding": "3.9.8", "vulnerable": true}, {"criteria": "cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*", "matchCriteriaId": "5F564F50-7DC5-4243-897A-D9334AC7B1BE", "versionEndExcluding": "3.10.5", "versionStartIncluding": "3.10.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*", "matchCriteriaId": "F54C5456-58D7-4042-96FA-BD88C9B88EB0", "versionEndExcluding": "3.11.1", "versionStartIncluding": "3.11.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In Moodle, insufficient redirect handling made it possible to blindly bypass cURL blocked hosts/allowed ports restrictions, resulting in a blind SSRF risk."}], "id": "CVE-2021-36396", "lastModified": "2025-03-05T16:15:35.433", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2023-03-06T21:15:10.577", "references": [{"source": "patrick@puiterwijk.org", "tags": ["Patch", "Vendor Advisory"], "url": "https://moodle.org/mod/forum/discuss.php?d=424802"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Vendor Advisory"], "url": "https://moodle.org/mod/forum/discuss.php?d=424802"}], "sourceIdentifier": "patrick@puiterwijk.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-918"}], "source": "patrick@puiterwijk.org", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-918"}], "source": "nvd@nist.gov", "type": "Primary"}]}