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CVE-2024-32983

Status: AnalyzedHigh (7.5)—

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

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

Misskey — Misskey

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2024-32983",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-32983",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2024-06-05T18:23:27.330641Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
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          "attackVector": "NETWORK",
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 4.2,
        "exploitabilityScore": 3.9
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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          "userInteraction": "NONE",
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  "published": "2024-06-03T16:15:08.567",
  "references": [
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      "url": "https://github.com/misskey-dev/misskey/commit/d2a5bb39e344fcb84a24ae60faafe4694b227b88",
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      "url": "https://github.com/misskey-dev/misskey/security/advisories/GHSA-2vxv-pv3m-3wvj",
      "tags": [
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      "url": "https://github.com/misskey-dev/misskey/commit/d2a5bb39e344fcb84a24ae60faafe4694b227b88",
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "description": [
        {
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          "value": "CWE-863"
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      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "Misskey es una plataforma de microblogging descentralizada de código abierto. Misskey no realiza una normalización adecuada en las estructuras JSON de los objetos de actividad entrantes firmados de ActivityPub antes de procesarlos, lo que permite a los actores de amenazas falsificar el contenido de las actividades firmadas y hacerse pasar por los autores de las actividades originales. Esta vulnerabilidad se solucionó en 2024.5.0."
    }
  ],
  "lastModified": "2026-06-17T07:30:49.163",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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}