Description
MCPJam inspector is the local-first development platform for MCP servers. Versions 1.4.2 and earlier are vulnerable to remote code execution (RCE) vulnerability, which allows an attacker to send a crafted HTTP request that triggers the installation of an MCP server, leading to RCE. Since MCPJam inspector by default listens on 0.0.0.0 instead of 127.0.0.1, an attacker can trigger the RCE remotely via a simple HTTP request. Version 1.4.3 contains a patch.
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected products
- MCPJam / inspector<= 1.4.2 – <= 1.4.2
Exploits & proofs of concept
- exploit-dbMCPJam Inspector - Remote Code Executionby Diamorphine
- nucleiMCPJam Inspector - Remote Code Executionby Louay-075
Updated 13m ago · 8 sources