{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2025-54888", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2025-07-31T17:23:33.476Z", "datePublished": "2025-08-09T01:31:53.319Z", "dateUpdated": "2025-08-11T13:48:53.546Z"}, "containers": {"cna": {"title": "@fedify/fedify: Improper Authentication and Incorrect Authorization", "problemTypes": [{"descriptions": [{"cweId": "CWE-287", "lang": "en", "description": "CWE-287: Improper Authentication", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-863", "lang": "en", "description": "CWE-863: Incorrect Authorization", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 8.7, "baseSeverity": "HIGH", "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", "version": "4.0"}}], "references": [{"name": "https://github.com/fedify-dev/fedify/security/advisories/GHSA-6jcc-xgcr-q3h4", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/fedify-dev/fedify/security/advisories/GHSA-6jcc-xgcr-q3h4"}, {"name": "https://github.com/fedify-dev/fedify/commit/226d9b84dbec52172a70138bba8861454afde42b", "tags": ["x_refsource_MISC"], "url": "https://github.com/fedify-dev/fedify/commit/226d9b84dbec52172a70138bba8861454afde42b"}], "affected": [{"vendor": "fedify-dev", "product": "fedify", "versions": [{"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", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2025-08-09T01:31:53.319Z"}, "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."}], "source": {"advisory": "GHSA-6jcc-xgcr-q3h4", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2025-08-11T13:48:34.676198Z", "id": "CVE-2025-54888", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-08-11T13:48:53.546Z"}}]}}

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{"cveTags": [], "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 librer\u00eda de TypeScript para crear aplicaciones de servidores federados con tecnolog\u00eda 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 omisi\u00f3n de autenticaci\u00f3n permite a cualquier atacante no autenticado suplantar la identidad de cualquier actor de ActivityPub mediante el env\u00edo 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 suplantaci\u00f3n completa del actor en todas las instancias de Fedify. Esto se solucion\u00f3 en las versiones 1.3.20, 1.4.13, 1.5.5, 1.6.8, 1.7.9 y 1.8.5."}], "id": "CVE-2025-54888", "lastModified": "2025-08-11T18:32:48.867", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.7, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "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", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2025-08-09T02:15:37.737", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/fedify-dev/fedify/commit/226d9b84dbec52172a70138bba8861454afde42b"}, {"source": "security-advisories@github.com", "url": "https://github.com/fedify-dev/fedify/security/advisories/GHSA-6jcc-xgcr-q3h4"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-287"}, {"lang": "en", "value": "CWE-863"}], "source": "security-advisories@github.com", "type": "Primary"}]}

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