CVE-2021-39169

Published: Aug 27, 2021Modified: Jun 17, 2026

5.4

Vector

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

Exploitability: 2.3 / Impact: 2.7

Source: NVD

Description

Misskey is a decentralized microblogging platform. In versions of Misskey prior to 12.51.0, malicious actors can use the web client built-in dialog to display a malicious string, leading to cross-site scripting (XSS). XSS could compromise the API request token. This issue has been fixed in version 12.51.0. There are no known workarounds aside from upgrading.

Affected (1)

Products: Misskey: Misskey

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Misskey Misskey	Before 12.51.0

Related CWEs

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

References (4)

https://github.com/misskey-dev/misskey/commit/ec203f7f795766f76b55fecc9248168c1cdf6c99

Source: security-advisories@github.com

PatchThird Party Advisory

https://github.com/misskey-dev/misskey/security/advisories/GHSA-pmmv-jwqh-f5ww

Source: security-advisories@github.com

PatchThird Party Advisory

https://github.com/misskey-dev/misskey/commit/ec203f7f795766f76b55fecc9248168c1cdf6c99

Source: af854a3a-2127-422b-91ae-364da2661108

PatchThird Party Advisory

https://github.com/misskey-dev/misskey/security/advisories/GHSA-pmmv-jwqh-f5ww

Source: af854a3a-2127-422b-91ae-364da2661108

PatchThird Party Advisory

Timeline

No history available yet.