CVE-2025-67364

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:efforthye:fast-filesystem-mcp:3.4.0:*:*:*:*:*:*:*", "matchCriteriaId": "1EFBA1CD-FEBF-481D-A8B9-355D27AD719B", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "fast-filesystem-mcp version 3.4.0 contains a critical path traversal vulnerability in its file operation tools including fast_read_file. This vulnerability arises from improper path validation that fails to resolve symbolic links to their actual physical paths. The safePath and isPathAllowed functions use path.resolve() which does not handle symlinks, allowing attackers to bypass directory access restrictions by creating symlinks within allowed directories that point to restricted system paths. When these symlinks are accessed through valid path references, the validation checks are circumvented, enabling access to unauthorized files."}, {"lang": "es", "value": "fast-filesystem-mcp versi\u00f3n 3.4.0 contiene una cr\u00edtica vulnerabilidad de salto de ruta en sus herramientas de operaci\u00f3n de archivos, incluyendo fast_read_file. Esta vulnerabilidad surge de una validaci\u00f3n de ruta inadecuada que no logra resolver los enlaces simb\u00f3licos a sus rutas f\u00edsicas reales. Las funciones safePath e isPathAllowed usan path.resolve() que no maneja enlaces simb\u00f3licos, permitiendo a los atacantes eludir las restricciones de acceso a directorios mediante la creaci\u00f3n de enlaces simb\u00f3licos dentro de directorios permitidos que apuntan a rutas de sistema restringidas. Cuando se accede a estos enlaces simb\u00f3licos a trav\u00e9s de referencias de ruta v\u00e1lidas, se eluden las comprobaciones de validaci\u00f3n, permitiendo el acceso a archivos no autorizados."}], "id": "CVE-2025-67364", "lastModified": "2026-11-04T22:10:00.210", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-67364", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-01-07T16:57:06.119858Z", "version": "2.0.3"}}]}, "published": "2026-01-07T17:16:01.723", "references": [{"source": "cve@mitre.org", "tags": ["Product"], "url": "https://github.com/efforthye/fast-filesystem-mcp"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Issue Tracking"], "url": "https://github.com/efforthye/fast-filesystem-mcp/issues/10"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-24"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

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