Vulnerability 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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Misskey | Misskey | < 12.90.0 |
Related Weaknesses (CWE)
References
- https://github.com/misskey-dev/misskey/blob/develop/CHANGELOG.md#12900-20210904Release NotesThird Party Advisory
- https://github.com/misskey-dev/misskey/commit/e1a8b158e04ad567d92d8daf3cc0898ee1PatchThird Party Advisory
- https://github.com/misskey-dev/misskey/security/advisories/GHSA-mqv7-gxh4-r5vfIssue TrackingPatchThird Party Advisory
- https://github.com/misskey-dev/misskey/blob/develop/CHANGELOG.md#12900-20210904Release NotesThird Party Advisory
- https://github.com/misskey-dev/misskey/commit/e1a8b158e04ad567d92d8daf3cc0898ee1PatchThird Party Advisory
- https://github.com/misskey-dev/misskey/security/advisories/GHSA-mqv7-gxh4-r5vfIssue TrackingPatchThird Party Advisory
FAQ
What is CVE-2021-39195?
CVE-2021-39195 is a vulnerability with a CVSS score of 7.7 (HIGH). 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...
How severe is CVE-2021-39195?
CVE-2021-39195 has been rated HIGH with a CVSS base score of 7.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-39195?
Check the references section above for vendor advisories and patch information. Affected products include: Misskey Misskey.