CVE-2024-32983
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.40%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- EPSS
- 0.40% probability · 34th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-863
- Affected
- misskey/misskey
- Source
- security-advisories@github.com
References
- https://github.com/misskey-dev/misskey/commit/d2a5bb39e344fcb84a24ae60faafe4694b227b88Patch
- https://github.com/misskey-dev/misskey/security/advisories/GHSA-2vxv-pv3m-3wvjExploit, Vendor Advisory
- https://github.com/misskey-dev/misskey/commit/d2a5bb39e344fcb84a24ae60faafe4694b227b88Patch
- https://github.com/misskey-dev/misskey/security/advisories/GHSA-2vxv-pv3m-3wvjExploit, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.