CVE-2024-32983

Misskey allows the impersonation and takeover of remote accounts with unnormalized signed activities

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

misskey-dev · misskey

CVSS v3.1 NVD

7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS v3.1 GITHUB

8.2 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N

EPSS

0.40% chance of exploitation in the next 30 days, 33rd percentile

Published

2024-06-03

Updated

2024-08-02

Proof-of-concept exploits (1)

• misskey-dev/misskey/security/advisories/GHSA-2vxv-pv3m-3wvj

Security advisories

• misskey-dev/misskey/commit/d2a5bb39e344fcb84a24ae60faafe4694b227b88

References

• CVE Record
• NVD entry