CVE-2021-39195

Server-Side Request Forgery vulnerability in misskey

CVSS 7.7 HIGHEPSS 1.0%CWE-918

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 7.7EPSS 1.0%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

07 Sep 2021Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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

Affected products

misskey-dev · misskey

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References

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