CVE-2025-6515

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "oatpp-mcp", "vendor": "oatpp", "versions": [{"status": "affected", "version": "0", "versionType": "cpe"}]}], "source": "reefs@jfrog.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The MCP SSE endpoint in oatpp-mcp returns an instance pointer as the session ID, which is not unique nor cryptographically secure. This allows network attackers with access to the oatpp-mcp server to guess future session IDs and hijack legitimate client MCP sessions, returning malicious responses from the oatpp-mcp server."}, {"lang": "es", "value": "El endpoint MCP SSE en oatpp-mcp devuelve un puntero de instancia como el ID de sesi\u00f3n, el cual no es \u00fanico ni criptogr\u00e1ficamente seguro. Esto permite a atacantes de red con acceso al servidor oatpp-mcp adivinar futuros ID de sesi\u00f3n y secuestrar sesiones MCP de clientes leg\u00edtimos, devolviendo respuestas maliciosas desde el servidor oatpp-mcp."}], "id": "CVE-2025-6515", "lastModified": "2026-10-08T22:10:00.563", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 5.2, "source": "reefs@jfrog.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-6515", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2025-10-20T16:33:42.234883Z", "version": "2.0.3"}}]}, "published": "2025-10-20T17:15:39.197", "references": [{"source": "reefs@jfrog.com", "url": "https://research.jfrog.com/vulnerabilities/oatpp-mcp-prompt-hijacking-jfsa-2025-001494691/"}], "sourceIdentifier": "reefs@jfrog.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-330"}], "source": "reefs@jfrog.com", "type": "Secondary"}]}

{}

{"created": "2025-10-21T09:39:51.247961+00:00", "updated": "2025-10-21T09:39:51.247988+00:00", "vendors": ["oatpp", "oatpp$PRODUCT$mcp"]}