aenvironment (=0.1.7rc1), agentic-ai-engineering-course (>=0.4.6 <=0.4.8) +163 more potentially affected by unknown CVE via fastmcp (>=2.0.0 <=2.12.5)

fastmcp PYPI version =2.0.0, =0.4.6, =1.8.0, =3.2.0, =3.2.0, =4.2.2, =3.0.2, =0.2.7, =1.0.0rc1, =0.2.7, =1.7.3, =0.1.12, =0.9.30, =0.14.3, =0.18.5 and more Source cves: unknown CVE Source advisory: SNYK:PYTHON-FASTMCP-13776148...

EUVD-2025-36666

FastMCP Auth Integration Allows for Confused Deputy Account Takeover...

GHSA-C2JP-C369-7PVX FastMCP Auth Integration Allows for Confused Deputy Account Takeover

Summary FastMCP documentation covers the scenario where it is possible to use Entra ID or other providers for authentication. In this context, because Entra ID does not support Dynamic Client Registration DCR, the FastMCP-hosted MCP server is acting as the authorization provider, as declared in t...

FastMCP Auth Integration Allows for Confused Deputy Account Takeover

Summary FastMCP documentation covers the scenario where it is possible to use Entra ID or other providers for authentication. In this context, because Entra ID does not support Dynamic Client Registration DCR, the FastMCP-hosted MCP server is acting as the authorization provider, as declared in t...

aenvironment (=0.1.7rc1), agentic-ai-engineering-course (>=0.4.6 <=0.4.8) +177 more potentially affected by CVE-2025-62801 via fastmcp (>=2.0.0 <=2.13.0)

fastmcp PYPI version =2.0.0, =0.4.6, =1.8.0, =3.2.0, =3.2.0, =4.2.2, =3.0.2, =0.2.7, =1.0.0rc1, =0.2.7, =1.7.3, =0.1.12, =0.9.30, =0.14.3, =0.18.5 and more Source cves: CVE-2025-62801 Source advisory: SNYK:PYTHON-FASTMCP-13745516...

Command Injection

Overview fastmcp is a The fast, Pythonic way to build MCP servers and clients. Affected versions of this package are vulnerable to Command Injection via the servername field. An attacker can execute arbitrary OS commands by supplying crafted input to this field during the installation process on...

CVE-2025-62801

FastMCP is the standard framework for building MCP applications. Versions prior to 2.13.0, a command-injection vulnerability lets any attacker who can influence the servername field of an MCP execute arbitrary OS commands on Windows hosts that run fastmcp install cursor. This vulnerability is fix...

CVE-2025-62800

FastMCP is the standard framework for building MCP applications. Versions prior to 2.13.0 have a reflected cross-site scripting vulnerability in the OAuth client callback page oauthcallback.py where unescaped user-controlled values are inserted into the generated HTML, allowing arbitrary JavaScri...

aenvironment (=0.1.7rc1), agentic-ai-engineering-course (>=0.4.6 <=0.4.8) +163 more potentially affected by CVE-2025-62800 via fastmcp (>=2.0.0 <=2.12.5)

fastmcp PYPI version =2.0.0, =0.4.6, =1.8.0, =3.2.0, =3.2.0, =4.2.2, =3.0.2, =0.2.7, =1.0.0rc1, =0.2.7, =1.7.3, =0.1.12, =0.9.30, =0.14.3, =0.18.5 and more Source cves: CVE-2025-62800 Source advisory: SNYK:PYTHON-FASTMCP-13746462...

Cross-site Scripting (XSS)

Overview fastmcp is a The fast, Pythonic way to build MCP servers and clients. Affected versions of this package are vulnerable to Cross-site Scripting XSS via the createcallbackhtml function. An attacker can execute arbitrary JavaScript in the context of the callback server's origin by supplying...

CVE-2025-62801 FastMCP vulnerable to windows command injection in FastMCP Cursor installer via server_name

FastMCP is the standard framework for building MCP applications. Versions prior to 2.13.0, a command-injection vulnerability lets any attacker who can influence the servername field of an MCP execute arbitrary OS commands on Windows hosts that run fastmcp install cursor. This vulnerability is fix...

CVE-2025-62801 FastMCP vulnerable to windows command injection in FastMCP Cursor installer via server_name

FastMCP is the standard framework for building MCP applications. Versions prior to 2.13.0, a command-injection vulnerability lets any attacker who can influence the servername field of an MCP execute arbitrary OS commands on Windows hosts that run fastmcp install cursor. This vulnerability is fix...

CVE-2025-62801 FastMCP vulnerable to windows command injection in FastMCP Cursor installer via server_name

FastMCP is the standard framework for building MCP applications. Versions prior to 2.13.0, a command-injection vulnerability lets any attacker who can influence the servername field of an MCP execute arbitrary OS commands on Windows hosts that run fastmcp install cursor. This vulnerability is fix...

CVE-2025-62801

CVE-2025-62801 affects FastMCP prior to version 2.13.0, where a command-injection vulnerability exists in how the server_name field is processed during the MCP installer cursor flow on Windows. An attacker who can influence the server_name value can cause arbitrary OS commands to run on Windows h...

CVE-2025-62800 FastMCP vulnerable to reflected XSS in client's callback page

FastMCP is the standard framework for building MCP applications. Versions prior to 2.13.0 have a reflected cross-site scripting vulnerability in the OAuth client callback page oauthcallback.py where unescaped user-controlled values are inserted into the generated HTML, allowing arbitrary JavaScri...

CVE-2025-62800

FastMCP (Python framework for MCP apps) is affected prior to version 2.13.0 by a reflected XSS in the OAuth client callback page (oauth_callback.py). The vulnerability occurs when unescaped user-controlled values are inserted into the generated HTML, enabling arbitrary JavaScript execution in the...

CVE-2025-62800 FastMCP vulnerable to reflected XSS in client's callback page

FastMCP is the standard framework for building MCP applications. Versions prior to 2.13.0 have a reflected cross-site scripting vulnerability in the OAuth client callback page oauthcallback.py where unescaped user-controlled values are inserted into the generated HTML, allowing arbitrary JavaScri...

CVE-2025-62800 FastMCP vulnerable to reflected XSS in client's callback page

FastMCP is the standard framework for building MCP applications. Versions prior to 2.13.0 have a reflected cross-site scripting vulnerability in the OAuth client callback page oauthcallback.py where unescaped user-controlled values are inserted into the generated HTML, allowing arbitrary JavaScri...

FastMCP 跨站脚本漏洞

FastMCP is an MCP server builder by the individual developer Jeremiah Lowin. A cross-site scripting vulnerability exists in FastMCP versions prior to 2.13.0, which stems from an unescaped user control value on the OAuth client callback page, which could lead to a reflective cross-site scripting...

PT-2025-44218

Name of the Vulnerable Software and Affected Versions FastMCP versions prior to 2.13.0 Description FastMCP, a framework for building MCP applications, contains a command-injection issue. An attacker who can control the server name field of an MCP can execute arbitrary OS commands on Windows hosts...