CVE-2021-36396

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Published Mar 6, 2023 CVSS 3.1 · 7.5 High EPSS 1.4% KEV · Not listed

Description

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

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

Moodle

affected

Version	Status	Constraints
`3.11, 3.10 to 3.10.4, 3.9 to 3.9.7 and earlier unsupported versions`	affected	—

Configuration 1 [-]

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

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source	ID	Title
EUVD	EUVD-2023-0870	In Moodle, insufficient redirect handling made it possible to blindly bypass cURL blocked hosts/allowed ports restrictions, resulting in a blind SSRF risk.
Github GHSA	GHSA-4rmj-w58m-fvch	Moodle vulnerable to Server-Side Request Forgery

Metrics

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.

Exploit prediction score: 1.4% (1.427% probability within 30 days)

Exploitation none

Automatable yes

Technical Impact partial

References

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

History

Mar 5, 2025 4:15 PM Scoring metrics updated View changes

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

Subscriptions

Moodle Moodle

Weaknesses

CWE-918

Sources

CVE record Updated: Mar 5, 2025, 3:49 PM

Status: PUBLISHED
Assigner: fedora
Published: Mar 6, 2023, 12:00 AM
Updated: Mar 5, 2025, 3:49 PM
Reserved: Jul 12, 2021, 12:00 AM

View source JSON

Vulnrichment Updated: Aug 4, 2024, 12:54 AM

Updated: Aug 4, 2024, 12:54 AM

NVD Updated: Jun 17, 2026, 3:58 AM

Status: Modified
Published: Mar 6, 2023, 9:15 PM
Modified: Jun 17, 2026, 3:58 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

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