CVE-2025-49596
MCP Inspector proxy server lacks authentication between the Inspector client and proxy
Description
The MCP inspector is a developer tool for testing and debugging MCP servers. Versions of MCP Inspector below 0.14.1 are vulnerable to remote code execution due to lack of authentication between the Inspector client and proxy, allowing unauthenticated requests to launch MCP commands over stdio. Users should immediately upgrade to version 0.14.1 or later to address these vulnerabilities.
INFO
Published Date :
June 13, 2025, 8:15 p.m.
Last Modified :
July 9, 2025, 9:15 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2025-49596
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | CRITICAL | [email protected] |
Solution
- Upgrade MCP Inspector to version 0.14.1 or later.
Public PoC/Exploit Available at Github
CVE-2025-49596 has a 45 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-49596.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-49596 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-49596
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Offensive MCP server auditor — detects tool poisoning, credential leaks, RCE vectors, SSRF, session hijacking, and supply chain vulnerabilities across stdio, HTTP, and SSE transports.
ai-security cve llm-security mcp model-context-protocol offensive-security pentest rce sarif security ssrf supply-chain tool-poisoning vulnerability-scanner
TypeScript JavaScript
A firewall for your AI agents. Zero-trust security proxy for MCP servers.
TypeScript JavaScript HTML CSS
Lite version of MCP inspector which can be locked to a URL
Dockerfile TypeScript JavaScript HTML CSS
OpenClaw Security Red Team Framework
Dockerfile JavaScript HTML Shell Python C
None
Dockerfile TypeScript JavaScript HTML CSS
MCP Inspector with LLM Chat Mode — test golden prompts with real tool selection and widget rendering
Dockerfile TypeScript JavaScript HTML CSS
Maximum isolation configuration for OpenClaw as a read-only research assistant in Docker sandbox
Shell
MCP tools for OpenStack on OpenShift
Python Shell Dockerfile
mcp scanner
Python Shell
None
Dockerfile TypeScript JavaScript HTML CSS
None
One-click AWS deploy for MCPGuard MCP security scanner service
Enterprise-grade MCP security & governance CLI - The S in MCP Stands for Security
JavaScript TypeScript
LLM Agent 安全攻击演示平台 - 支持模拟演示和真实API测试
JavaScript HTML CSS Python Shell Mako
Educational/Research companion: Security vulnerabilities in AI coding assistants (Claude, Cursor, Copilot) - CVEs, supply chain attacks, trust boundaries
Dockerfile Shell Jupyter Notebook Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-49596 vulnerability anywhere in the article.
-
The Hacker News
Critical mcp-remote Vulnerability Enables Remote Code Execution, Impacting 437,000+ Downloads
Cybersecurity researchers have discovered a critical vulnerability in the open-source mcp-remote project that could result in the execution of arbitrary operating system (OS) commands. The vulnerabili ... Read more
-
Cyber Security News
Critical Vulnerability in Anthropic MCP Inspector Let Attackers Execute Arbitrary Code
A critical Remote Code Execution (RCE) vulnerability in Anthropic’s MCP Inspector tool, designated as CVE-2025-49596, has a severe CVSS score of 9.4. This vulnerability represents one of the first cri ... Read more
-
The Hacker News
Critical Vulnerability in Anthropic's MCP Exposes Developer Machines to Remote Exploits
Cybersecurity researchers have discovered a critical security vulnerability in artificial intelligence (AI) company Anthropic's Model Context Protocol (MCP) Inspector project that could result in remo ... Read more
-
Daily CyberSecurity
Critical RCE in MCP Inspector Exposes AI Devs to Web-Based Exploits (CVE-2025-49596)
A critical vulnerability—CVE-2025-49596—affected the AI developer ecosystem in June 2025, when Oligo Security Research disclosed a severe Remote Code Execution (RCE) flaw in the MCP Inspector, a core ... Read more
-
Daily CyberSecurity
CVE-2025-49596: Critical RCE Vulnerability in MCP Inspector Exposes AI Developer Environments
A newly disclosed security flaw in the MCP Inspector, a tool designed to test and debug Machine Context Protocol (MCP) servers, could allow unauthenticated remote code execution (RCE) — potentially pu ... Read more
-
Daily CyberSecurity
Two sslh Flaws Disclosed: Remote DoS Attacks Possible via Protocol Multiplexer
In June 2025, the SUSE Security Team disclosed critical vulnerabilities in sslh, a lightweight protocol multiplexer used to serve multiple services—such as SSH and HTTPS—on the same port. Though desig ... Read more
The following table lists the changes that have been made to the
CVE-2025-49596 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
Jul. 09, 2025
Action Type Old Value New Value Added Reference https://thenewstack.io/mcp-vulnerability-exposes-the-ai-untrusted-code-crisis Added Reference https://www.oligo.security/blog/critical-rce-vulnerability-in-anthropic-mcp-inspector-cve-2025-49596 -
New CVE Received by [email protected]
Jun. 13, 2025
Action Type Old Value New Value Added Description The MCP inspector is a developer tool for testing and debugging MCP servers. Versions of MCP Inspector below 0.14.1 are vulnerable to remote code execution due to lack of authentication between the Inspector client and proxy, allowing unauthenticated requests to launch MCP commands over stdio. Users should immediately upgrade to version 0.14.1 or later to address these vulnerabilities. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-306 Added Reference https://github.com/modelcontextprotocol/inspector/commit/50df0e1ec488f3983740b4d28d2a968f12eb8979 Added Reference https://github.com/modelcontextprotocol/inspector/security/advisories/GHSA-7f8r-222p-6f5g