CVE-2025-59934

{"id": "CVE-2025-59934", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-59934", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2025-09-29T14:59:35.884199Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.4, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.5, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "formbricks", "product": "formbricks", "versions": [{"status": "affected", "version": "< 4.0.1"}]}]}], "published": "2025-09-26T23:15:32.613", "references": [{"url": "https://github.com/formbricks/formbricks/blob/843110b0d6c37b5c0da54291616f84c91c55c4fc/apps/web/lib/jwt.ts#L114-L117", "source": "security-advisories@github.com"}, {"url": "https://github.com/formbricks/formbricks/commit/eb1349f205189d5b2d4a95ec42245ca98cf68c82", "source": "security-advisories@github.com"}, {"url": "https://github.com/formbricks/formbricks/pull/6596", "source": "security-advisories@github.com"}, {"url": "https://github.com/formbricks/formbricks/security/advisories/GHSA-7229-q9pv-j6p4", "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-345"}, {"lang": "en", "value": "CWE-347"}]}], "descriptions": [{"lang": "en", "value": "Formbricks is an open source qualtrics alternative. Prior to version 4.0.1, Formbricks is missing JWT signature verification. This vulnerability stems from a token validation routine that only decodes JWTs (jwt.decode) without verifying their signatures. Both the email verification token login path and the password reset server action use the same validator, which does not check the token\u2019s signature, expiration, issuer, or audience. If an attacker learns the victim\u2019s actual user.id, they can craft an arbitrary JWT with an alg: \"none\" header and use it to authenticate and reset the victim\u2019s password. This issue has been patched in version 4.0.1."}, {"lang": "es", "value": "Formbricks es una alternativa de c\u00f3digo abierto a Qualtrics. Antes de la versi\u00f3n 4.0.1, Formbricks carece de verificaci\u00f3n de firma JWT. Esta vulnerabilidad se deriva de una rutina de validaci\u00f3n de tokens que solo decodifica JWTs (jwt.decode) sin verificar sus firmas. Tanto la ruta de inicio de sesi\u00f3n del token de verificaci\u00f3n de correo electr\u00f3nico como la acci\u00f3n del servidor de restablecimiento de contrase\u00f1a utilizan el mismo validador, que no verifica la firma, la caducidad, el emisor o la audiencia del token. Si un atacante aprende el user.id real de la v\u00edctima, puede crear un JWT arbitrario con un encabezado alg: 'none' y usarlo para autenticar y restablecer la contrase\u00f1a de la v\u00edctima. Este problema ha sido parcheado en la versi\u00f3n 4.0.1."}], "lastModified": "2026-10-19T16:10:00.260", "sourceIdentifier": "security-advisories@github.com"}