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CVE-2025-6515

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CVSS 3.1
6.8 medium
EPSS
<1%p31
Published
()
Modified
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.

Weakness
CWE-330
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H
NVD CVE.org GitHub PoCs EPSS (0.4%)

In the news

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