CVE-2021-39195
Misskey SSRF 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.
INFO
Published Date :
Sept. 7, 2021, 7:15 p.m.
Last Modified :
Nov. 21, 2024, 6:18 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
4.0
Exploitability Score :
3.1
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-39195.
| URL | Resource |
|---|---|
| https://github.com/misskey-dev/misskey/blob/develop/CHANGELOG.md#12900-20210904 | Release Notes Third Party Advisory |
| https://github.com/misskey-dev/misskey/commit/e1a8b158e04ad567d92d8daf3cc0898ee18f1a2e | Patch Third Party Advisory |
| https://github.com/misskey-dev/misskey/security/advisories/GHSA-mqv7-gxh4-r5vf | Issue Tracking Patch Third Party Advisory |
| https://github.com/misskey-dev/misskey/blob/develop/CHANGELOG.md#12900-20210904 | Release Notes Third Party Advisory |
| https://github.com/misskey-dev/misskey/commit/e1a8b158e04ad567d92d8daf3cc0898ee18f1a2e | Patch Third Party Advisory |
| https://github.com/misskey-dev/misskey/security/advisories/GHSA-mqv7-gxh4-r5vf | Issue Tracking Patch Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-39195 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-39195 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://github.com/misskey-dev/misskey/blob/develop/CHANGELOG.md#12900-20210904 Added Reference https://github.com/misskey-dev/misskey/commit/e1a8b158e04ad567d92d8daf3cc0898ee18f1a2e Added Reference https://github.com/misskey-dev/misskey/security/advisories/GHSA-mqv7-gxh4-r5vf -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Sep. 14, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:S/C:P/I:N/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Changed Reference Type https://github.com/misskey-dev/misskey/blob/develop/CHANGELOG.md#12900-20210904 No Types Assigned https://github.com/misskey-dev/misskey/blob/develop/CHANGELOG.md#12900-20210904 Release Notes, Third Party Advisory Changed Reference Type https://github.com/misskey-dev/misskey/commit/e1a8b158e04ad567d92d8daf3cc0898ee18f1a2e No Types Assigned https://github.com/misskey-dev/misskey/commit/e1a8b158e04ad567d92d8daf3cc0898ee18f1a2e Patch, Third Party Advisory Changed Reference Type https://github.com/misskey-dev/misskey/security/advisories/GHSA-mqv7-gxh4-r5vf No Types Assigned https://github.com/misskey-dev/misskey/security/advisories/GHSA-mqv7-gxh4-r5vf Issue Tracking, Patch, Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:misskey:misskey:*:*:*:*:*:*:*:* versions up to (excluding) 12.90.0
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-39195 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-39195
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.10 }} 0.00%
score
0.39792
percentile