Vulnerability · Published Jun 3, 2024 · Assigned by GitHub_M

CVE-2024-32983Misskey allows the impersonation and takeover of remote accounts with unnormalized signed activities

High 8.2

In plain English

A high-severity incorrect authorization in misskey from misskey-dev. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 34% of all known vulnerabilities).

Severity (CVSS 3.1)8.2High

Exploit odds (30 days)0.4%top 65.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Misskey is an open source, decentralized microblogging platform. Misskey doesn't perform proper normalization on the JSON structures of incoming signed ActivityPub activity objects before processing them, allowing threat actors to spoof the contents of signed activities and impersonate the authors of the original activities. This vulnerability is fixed in 2024.5.0.

Affected products (as reported)

Vendor	Product	Versions
misskey-dev	misskey	< 2024.5.0

Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N

References

https://github.com/misskey-dev/misskey/security/advisories/GHSA-2vxv-pv3m-3wvj x_refsource_CONFIRM
https://github.com/misskey-dev/misskey/commit/d2a5bb39e344fcb84a24ae60faafe4694b227b88 x_refsource_MISC