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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2025-66454 Detail

Description

Arcade MCP allows you to to create, deploy, and share MCP Servers. Prior to 1.5.4, the arcade-mcp HTTP server uses a hardcoded default worker secret ("dev") that is never validated or overridden during normal server startup. As a result, any unauthenticated attacker who knows this default key can forge valid JWTs and fully bypass the FastAPI authentication layer. This grants remote access to all worker endpoints—including tool enumeration and tool invocation—without credentials. This vulnerability is fixed in 1.5.4.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://github.com/ArcadeAI/arcade-mcp/commit/44660d18ceb220600401303df860a31ca766c817 GitHub, Inc.
https://github.com/ArcadeAI/arcade-mcp/pull/691 GitHub, Inc.
https://github.com/ArcadeAI/arcade-mcp/security/advisories/GHSA-g2jx-37x6-6438 GitHub, Inc.

Weakness Enumeration

CWE-ID CWE Name Source
CWE-798 Use of Hard-coded Credentials GitHub, Inc.  
CWE-321 Use of Hard-coded Cryptographic Key GitHub, Inc.  

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-66454
NVD Published Date:
12/02/2025
NVD Last Modified:
12/02/2025
Source:
GitHub, Inc.