CVE-2025-61928

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{"affected": [{"affectedData": [{"product": "better-auth", "vendor": "better-auth", "versions": [{"status": "affected", "version": "< 1.3.26"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Better Auth is an authentication and authorization library for TypeScript. In versions prior to 1.3.26, unauthenticated attackers can create or modify API keys for any user by passing that user's id in the request body to the `api/auth/api-key/create` route. `session?.user ?? (authRequired ? null : { id: ctx.body.userId })`. When no session exists but `userId` is present in the request body, `authRequired` becomes false and the user object is set to the attacker-controlled ID. Server-only field validation only executes when `authRequired` is true (lines 280-295), allowing attackers to set privileged fields. No additional authentication occurs before the database operation, so the malicious payload is accepted. The same pattern exists in the update endpoint. This is a critical authentication bypass enabling full an unauthenticated attacker can generate an API key for any user and immediately gain complete authenticated access. This allows the attacker to perform any action as the victim user using the api key, potentially compromise the user data and the application depending on the victim's privileges. Version 1.3.26 contains a patch for the issue."}, {"lang": "es", "value": "Better Auth es una biblioteca de autenticaci\u00f3n y autorizaci\u00f3n para TypeScript. En versiones anteriores a la 1.3.26, atacantes no autenticados pueden crear o modificar claves API para cualquier usuario pasando el ID de ese usuario en el cuerpo de la solicitud a la ruta 'api/auth/api-key/create'. 'session?.user ?? (authRequired ? null : { id: ctx.body.userId })'. Cuando no existe ninguna sesi\u00f3n pero 'userId' est\u00e1 presente en el cuerpo de la solicitud, 'authRequired' se vuelve falso y el objeto de usuario se establece en el ID controlado por el atacante. La validaci\u00f3n de campos solo del servidor solo se ejecuta cuando 'authRequired' es verdadero (l\u00edneas 280-295), permitiendo a los atacantes establecer campos privilegiados. No se produce ninguna autenticaci\u00f3n adicional antes de la operaci\u00f3n de la base de datos, por lo que la carga \u00fatil maliciosa es aceptada. El mismo patr\u00f3n existe en el endpoint de actualizaci\u00f3n. Esto es una omisi\u00f3n de autenticaci\u00f3n cr\u00edtica que permite que un atacante no autenticado pueda generar una clave API para cualquier usuario y obtener inmediatamente acceso autenticado completo. Esto permite al atacante realizar cualquier acci\u00f3n como el usuario v\u00edctima utilizando la clave API, potencialmente comprometer los datos del usuario y la aplicaci\u00f3n dependiendo de los privilegios de la v\u00edctima. La versi\u00f3n 1.3.26 contiene un parche para el problema."}], "id": "CVE-2025-61928", "lastModified": "2026-10-19T16:10:00.260", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 9.3, "baseSeverity": "CRITICAL", "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:H/VI:H/VA:H/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": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-61928", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2025-10-10T14:23:17.755463Z", "version": "2.0.3"}}]}, "published": "2025-10-09T22:15:32.817", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/better-auth/better-auth/commit/556085067609c508f8c546ceef9003ee8c607d39"}, {"source": "security-advisories@github.com", "url": "https://github.com/better-auth/better-auth/security/advisories/GHSA-99h5-pjcv-gr6v"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/better-auth/better-auth/security/advisories/GHSA-99h5-pjcv-gr6v"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-285"}, {"lang": "en", "value": "CWE-306"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"created": "2025-10-10T11:17:44.284847+00:00", "updated": "2025-10-10T11:17:44.284873+00:00", "vendors": ["better-auth", "better-auth$PRODUCT$better_auth"]}