Is CVE-2021-39195 actively exploited?

CVE-2021-39195 has no public evidence of in-the-wild exploitation as of 2024-11-21.

What is the CVSS score for CVE-2021-39195?

CVE-2021-39195 has a CVSS score of 7.7 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.

How do I patch CVE-2021-39195?

Patch guidance is available from misskey security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2021-39195.

Fix CVE-2021-39195 - HIGH misskey misskey

Description

Misskey is an open source, decentralized microblogging platform. In affected versions a Server-Side Request Forgery vulnerability exists in "Upload from URL" and remote attachment handling. This could result in the disclosure of non-public information within the internal network. This has been fixed in 12.90.0. However, if you are using a proxy, you will need to take additional measures. As a workaround this exploit may be avoided by appropriately restricting access to private networks from the host where the application is running.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Attack Vector: network
Complexity: low
Privileges: low
User Action: none
Scope: changed
Confidentiality: high
Integrity: none
Availability: none
Weaknesses: CWE-918 · Server-Side Request Forgery

Metadata

Primary Vendor: MISSKEY
Published: 9/7/2021
Last Modified: 11/21/2024
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2021-39195

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary