Home/CVE/Misskey is a decentralized microblogging platform. In versions of Misskey prior to 12.51.0, malicious actors can use the
CVE

CVE-2021-39169

Misskey is a decentralized microblogging platform. In versions of Misskey prior to 12.51.0, malicious actors can use the

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.

HIGH · CVSS 8 EPSS 0.0032
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
▤

Affected Products & Versions

1
misskey< 12.51.0
▣

Scoring & Timeline

8
HIGH · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD27 Aug 2021 · 01:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/misskey-dev/misskey/commit/ec203f7f795766f76b55fecc9248168c1cdf6c99PatchThird Party Advisory
https://github.com/misskey-dev/misskey/security/advisories/GHSA-pmmv-jwqh-f5wwPatchThird Party Advisory
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