CVE-2021-39195 Information

Description

Misskey is an open source decentralized microblogging platform. In affected versions a Server-Side Request Forgery vulnerability exists in �pload 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 Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Reference

https://github.com/misskey-dev/misskey/security/advisories/GHSA-mqv7-gxh4-r5vf https://github.com/misskey-dev/misskey/commit/e1a8b158e04ad567d92d8daf3cc0898ee18f1a2e https://github.com/misskey-dev/misskey/blob/develop/CHANGELOG.md#12900-20210904

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

6.5