CVE-2021-40978 - Vulnerability Details - OpenCVE

Description

The mkdocs 1.2.2 built-in dev-server allows directory traversal using the port 8000, enabling remote exploitation to obtain :sensitive information. NOTE: the vendor has disputed this as described in https://github.com/mkdocs/mkdocs/issues/2601.] and https://github.com/nisdn/CVE-2021-40978/issues/1

Published: 2021-10-07

Score: 7.5 High

EPSS: 79.7% High

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

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

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

Configuration 1 [-]

cpe:2.3:a:mkdocs:mkdocs:1.2.2:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

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Advisories

Source	ID	Title
Github GHSA	GHSA-qh9q-34h6-hcv9	Directory traversal in mkdocs

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact Partial

Integrity Impact None

Availability Impact None

This CVE is not in the KEV list.

The EPSS score is 0.79718.

Exploitation poc

Automatable no

Technical Impact partial

References

Link	Providers
https://github.com/mkdocs/mkdocs
https://github.com/mkdocs/mkdocs/issues/2601
https://github.com/nisdn/CVE-2021-40978
https://github.com/nisdn/CVE-2021-40978/issues/1

History

Wed, 25 Feb 2026 10:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Subscriptions

Mkdocs Mkdocs

MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2021-10-07T13:23:41.000Z

Updated: 2024-08-04T02:59:30.392Z

Reserved: 2021-09-13T00:00:00.000Z

Link: CVE-2021-40978

Vulnrichment

Updated: 2024-08-04T02:59:30.392Z

NVD

Status : Modified

Published: 2021-10-07T14:15:08.280

Modified: 2024-11-21T06:25:11.387

Link: CVE-2021-40978

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-22

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