Misskey allows the impersonation and takeover of remote accounts with unnormalized signed activities
Priority LOW 36CWE-863Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Low · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-863.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.004 34th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed misskey (misskey-dev): 2024.5.0
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| misskey-dev | misskey | before 2024.5.0 | 2024.5.0 | Patch available | CNA |
- misskey Vendormisskey-dev Affected before 2024.5.0 Fixed in 2024.5.0 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:misskey:misskey:*:*:*:*:*:*:*:* | before 2024.5.0 | Vulnerable | misskey-dev |
- cpe:2.3:a:misskey:misskey:*:*:*:*:*:*:*:* Versions before 2024.5.0 Vulnerable ·misskey-dev
Remediation
- Fix · CNA misskey (misskey-dev) Fixed in 2024.5.0
Timeline
- 2026-10-02 Threatist record created from CVE-2024-32983
References
More misskey-dev Misskey vulnerabilities
- TI-2025-18599 Misskey CSRF vulnerability due to insecure configuration of authentication cookie attributes CVSS 3.1HIGH 8.2
- TI-2025-29081 Misskey CSS Style Injection Vulnerability In `MkUrlPreview` CVSS 3.1HIGH 7.2
- TI-2025-40906 Misskey has a login rate limit bypass via spoofed X-Forwarded-For header CVSS 4.0MEDIUM 6.9
- TI-2025-29276 Misskey Directory Traversal Vulnerability in AiScript via `Mk:api` CVSS 3.1HIGH 7.5
- TI-2025-40839 misskey.js's export data contains private post data CVSS 4.0HIGH 7.1
- TI-2026-22705 Misskey lacks proper authorization checks and input validation CVSS 4.0CRITICAL 9.2
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences