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CVE-2025-66454

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 vulnerabili
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:64585236ee49de8bc6ca2fc1c2a268d8896ce7769f360ea7355805b4c7bb6261
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-798","description":"CWE-798: Use of Hard-coded Credentials","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:c3f8cceaf63f4ab1a099f74d4402f3efcd115fdad5947b6fbbf5290d2b58f380 · sha256:cda40937d736775c… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-321","description":"CWE-321: Use of Hard-coded Cryptographic Key","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:c3f8cceaf63f4ab1a099f74d4402f3efcd115fdad5947b6fbbf5290d2b58f380 · sha256:cda40937d736775c… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"arcade-mcp","vendor":"ArcadeAI","versions":[{"status":"affected","version":"< 1.5.4"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:c3f8cceaf63f4ab1a099f74d4402f3efcd115fdad5947b6fbbf5290d2b58f380 · sha256:cda40937d736775c… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:c3f8cceaf63f4ab1a099f74d4402f3efcd115fdad5947b6fbbf5290d2b58f380 · sha256:cda40937d736775c… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-798","description":"CWE-798: Use of Hard-coded Credentials","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:c3f8cceaf63f4ab1a099f74d4402f3efcd115fdad5947b6fbbf5290d2b58f380 · sha256:cda40937d736775c… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-321","description":"CWE-321: Use of Hard-coded Cryptographic Key","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:c3f8cceaf63f4ab1a099f74d4402f3efcd115fdad5947b6fbbf5290d2b58f380 · sha256:cda40937d736775c… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/ArcadeAI/arcade-mcp/commit/44660d18ceb220600401303df860a31ca766c817","tags":["x_refsource_MISC"],"url":"https://github.com/ArcadeAI/arcade-mcp/commit/44660d18ceb220600401303df860a31ca766c817"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c3f8cceaf63f4ab1a099f74d4402f3efcd115fdad5947b6fbbf5290d2b58f380 · sha256:cda40937d736775c… · /containers/cna/references/2
{"name":"https://github.com/ArcadeAI/arcade-mcp/pull/691","tags":["x_refsource_MISC"],"url":"https://github.com/ArcadeAI/arcade-mcp/pull/691"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c3f8cceaf63f4ab1a099f74d4402f3efcd115fdad5947b6fbbf5290d2b58f380 · sha256:cda40937d736775c… · /containers/cna/references/1
{"name":"https://github.com/ArcadeAI/arcade-mcp/security/advisories/GHSA-g2jx-37x6-6438","tags":["x_refsource_CONFIRM"],"url":"https://github.com/ArcadeAI/arcade-mcp/security/advisories/GHSA-g2jx-37x6-6438"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c3f8cceaf63f4ab1a099f74d4402f3efcd115fdad5947b6fbbf5290d2b58f380 · sha256:cda40937d736775c… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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