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1 vulnerability by ArcadeAI

CVE-2025-66454 (GCVE-0-2025-66454)

Vulnerability from cvelistv5 – Published: 2025-12-02 18:23 – Updated: 2025-12-02 19:28
VLAI
Title
Arcade MCP Default Hardcoded Worker Secret Allows Full Unauthorized Access to All HTTP MCP Worker Endpoints
Summary
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.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-321 - Use of Hard-coded Cryptographic Key
  • CWE-798 - Use of Hard-coded Credentials
Assigner
References
Impacted products
Vendor Product Version
ArcadeAI arcade-mcp Affected: < 1.5.4
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