CVE-2025-54888

{
  "id": "CVE-2025-54888",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-54888",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-08-11T13:48:34.676198Z"
        }
      }
    ],
    "cvssMetricV40": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "Safety": "NOT_DEFINED",
          "version": "4.0",
          "Recovery": "NOT_DEFINED",
          "baseScore": 8.7,
          "Automatable": "NOT_DEFINED",
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "exploitMaturity": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "privilegesRequired": "NONE",
          "subIntegrityImpact": "NONE",
          "vulnIntegrityImpact": "HIGH",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "vulnAvailabilityImpact": "NONE",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "subConfidentialityImpact": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "confidentialityRequirement": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
        }
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "fedify-dev",
          "product": "fedify",
          "versions": [
            {
              "status": "affected",
              "version": "< 1.3.20"
            },
            {
              "status": "affected",
              "version": ">= 1.4.0-dev.585, < 1.4.13"
            },
            {
              "status": "affected",
              "version": ">= 1.5.0-dev.636, < 1.5.5"
            },
            {
              "status": "affected",
              "version": ">= 1.6.0-dev.754, < 1.6.8"
            },
            {
              "status": "affected",
              "version": ">= 1.7.0-pr.251.885, < 1.7.9"
            },
            {
              "status": "affected",
              "version": ">= 1.8.0-dev.909, < 1.8.5"
            }
          ]
        }
      ]
    }
  ],
  "published": "2025-08-09T02:15:37.737",
  "references": [
    {
      "url": "https://github.com/fedify-dev/fedify/commit/14a2f8c6d2c3cbc00c3170a86ad3b7b8555c6847",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/fedify-dev/fedify/security/advisories/GHSA-6jcc-xgcr-q3h4",
      "source": "security-advisories@github.com"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-287"
        },
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Fedify is a TypeScript library for building federated server apps powered by ActivityPub. In versions below 1.3.20, 1.4.0-dev.585 through 1.4.12, 1.5.0-dev.636 through 1.5.4, 1.6.0-dev.754 through 1.6.7, 1.7.0-pr.251.885 through 1.7.8 and 1.8.0-dev.909 through 1.8.4, an authentication bypass vulnerability allows any unauthenticated attacker to impersonate any ActivityPub actor by sending forged activities signed with their own keys. Activities are processed before verifying the signing key belongs to the claimed actor, enabling complete actor impersonation across all Fedify instances. This is fixed in versions 1.3.20, 1.4.13, 1.5.5, 1.6.8, 1.7.9 and 1.8.5."
    },
    {
      "lang": "es",
      "value": "Fedify es una librería de TypeScript para crear aplicaciones de servidores federados con tecnología ActivityPub. En las versiones anteriores a la 1.3.20, 1.4.0-dev.585 a 1.4.12, 1.5.0-dev.636 a 1.5.4, 1.6.0-dev.754 a 1.6.7, 1.7.0-pr.251.885 a 1.7.8 y 1.8.0-dev.909 a 1.8.4, una vulnerabilidad de omisión de autenticación permite a cualquier atacante no autenticado suplantar la identidad de cualquier actor de ActivityPub mediante el envío de actividades falsificadas firmadas con sus propias claves. Las actividades se procesan antes de verificar que la clave de firma pertenezca al actor declarado, lo que permite la suplantación completa del actor en todas las instancias de Fedify. Esto se solucionó en las versiones 1.3.20, 1.4.13, 1.5.5, 1.6.8, 1.7.9 y 1.8.5."
    }
  ],
  "lastModified": "2026-06-17T09:40:52.337",
  "sourceIdentifier": "security-advisories@github.com"
}