Reuse of session IDs in oatpp-mcp leads to session hijacking and prompt hijacking by remote attackers_CVE-2025-6515

{
    "lastseen": "",
    "description": "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.",
    "published": "2025-10-20T16:13:43.527Z",
    "modified": "2025-10-20T16:33:47.787Z",
    "type": "cve",
    "title": "Reuse of session IDs in oatpp-mcp leads to session hijacking and prompt hijacking by remote attackers",
    "source": "JFROG",
    "references": "https://research.jfrog.com/vulnerabilities/oatpp-mcp-prompt-hijacking-jfsa-2025-001494691/",
    "id": "CVE-2025-6515",
    "bulletinFamily": "",
    "cwe": [
        "CWE-330"
    ],
    "cvelist": null,
    "sourceData": "oatpp oatpp-mcp 0",
    "sourceHref": "",
    "cvss": {
        "score": 6.8,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "oatpp-mcp",
    "version": "0",
    "vendor": "oatpp",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}