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

What is CVE-2024-32983?

CVE-2024-32983 is a high-severity authentication bypass vulnerability in misskey-dev misskey, published on 3 Jun 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

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.

Weakness: CWE-863

Which versions are affected by CVE-2024-32983?

It affects 1 product.

Products include Misskey Misskey.

How do I fix CVE-2024-32983?

No fix has been published for CVE-2024-32983 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2024-32983 being exploited?

There is no known exploitation of CVE-2024-32983 in the wild and no public exploit code.

Other vulnerabilities in misskey-dev misskey

• CVE-2025-25306 Misskey's Incomplete Patch of CVE-2024-52591 Leads to Forgery of Federated Notes Critical 9.3
• CVE-2023-49079 Misskey's missing signature validation allows arbitrary users to impersonate any remote user. Critical 9.3
• CVE-2026-28431 Misskey lacks proper authorization checks and input validation Critical 9.2
• CVE-2023-52139 Misskey vulnerable to improper authorization when accessing with third-party application Critical 9.1
• CVE-2024-52590 Missing validation allows spoofed profiles in Misskey High 8.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-2vxv-pv3m-3wvj.