{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2025-6515","assignerOrgId":"48a46f29-ae42-4e1d-90dd-c1676c1e5e6d","state":"PUBLISHED","assignerShortName":"JFROG","dateReserved":"2025-06-23T10:56:07.978Z","datePublished":"2025-10-20T16:13:43.527Z","dateUpdated":"2025-10-20T16:33:47.787Z"},"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"oatpp-mcp","vendor":"oatpp","versions":[{"status":"affected","version":"0","versionType":"cpe"}]}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"<p>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. </p>"}],"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."}],"metrics":[{"cvssV3_1":{"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"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-330","description":"CWE-330 Use of Insufficiently Random Values","lang":"en","type":"CWE"}]}],"providerMetadata":{"orgId":"48a46f29-ae42-4e1d-90dd-c1676c1e5e6d","shortName":"JFROG","dateUpdated":"2025-10-20T16:13:43.527Z"},"references":[{"tags":["third-party-advisory"],"url":"https://research.jfrog.com/vulnerabilities/oatpp-mcp-prompt-hijacking-jfsa-2025-001494691/"}],"source":{"discovery":"EXTERNAL"},"title":"Reuse of session IDs in oatpp-mcp leads to session hijacking and prompt hijacking by remote attackers"},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-10-20T16:33:42.234883Z","id":"CVE-2025-6515","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2025-10-20T16:33:47.787Z"}}]}}