Skills/npm/auth

auth@1.11.3

CAUTION· install only

Publisher claims: "Authentication and authorization for FrontMCP servers: auth modes, OAuth 2.1 (local and remote), JWT and session checks, authorities and the credential vault" Observed in sandbox: no network, touches nothing outside the project, writes no memory.

Registry npm (MCP server)Publisher frontmcp · publishing for 338 daysInstalls 12,542Last detonated 3d ago
What would fix thisWatchDispute verdict

Coverage

Nothing executable in the bundle ran; the trace covers the install step only.
Tested
every file read, file written and host contacted by what ran
Not tested
use of the skill by an agent

What this means for the label: Caution here covers what ran. The server's tools were not exercised with a real credential, so nothing about their behavior is asserted; the credential summary below says what to do with that.

Before you give it your token

It will ask for
no credential variables read in the code
Where it talks to
no vendor host named in the codeAlso jsdelivr.net, gstatic.com — not the publisher's domain; check what for before connecting.
What the honeypot saw
no credential files read · no network
What we could not test
use of the skill by an agent

Connect it under the guard. Nothing executable in the bundle ran; the trace covers the install step only. The code names no credential variable; the guard pins the network to what the honeypot saw and logs every call.

$vet-skills run --net declared -- npx -y @frontmcp/auth

Never paste a credential into a chat, a ticket or a report, including ours. How the guard holds it.

Is [email protected] safe to install?

KillerSkills ran it in the KillerSkills honeypot sandbox (1 scenario; nothing executable in the bundle ran; the trace covers the install step only) on 2026-11-11 and scored it 75/100 (Caution). It is not known to be malicious, but it has behaviour or code a security policy should decide on before install. Notable findings: Base64 encoding combined with network call; URL with embedded credentials; URL with embedded credentials. Summary: no network, touches nothing outside the project, writes no memory.

Behavior trace

Honeypot run · 0 s · 1 scenarios · 0 deviations
t+CategoryObserved action
0.0sprocessno install scripts in bundle
0.0sprocessscript backend runs setup only
0.0sprocessscript backend runs setup only
0.0sprocessno install scripts to re-run

Static findings

HIGH
Base64 encoding combined with network callindex.js:394 · Base64 encoding combined with network call — potential data exfiltration…(()=>controller.abort(),options.timeoutMs??DEFAULT_TIMEOUT_MS);try{return await fetch(url,{...init,redirect:"error",signal:controller.signal})}finally{clearTimeout(timer)}}function describeOAuthError(body){if(!body||typeof body!=="object")…Fix: Put hosts, commands and strings in plain source. Decoding at runtime looks identical to malware and costs points on its own.
AST07
MEDIUM
File type combined with upload actionesm/index.mjs:395 · File type combined with upload action — agent may exfiltrate local data files…n([z7.literal("memory"),z7.object({...noBacking,sqlite:secureStoreBackingSchemas.sqlite,...secureStoreCommonFields}),z7.object({...noBacking,redis:secureStoreBackingSchemas.redis,...secureStoreCommonFields}),z7.object({...noBacking,backend…Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
HIGH
URL with embedded credentialsesm/index.mjs:9 · URL with embedded credentials — may be phishing or credential leaking…lwind:"https://cdn.jsdelivr.net/npm/@tailwindcss/browser@4",fonts:{preconnect:["https://fonts.googleapis.com","https://fonts.gstatic.com"],stylesheet:"https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap"}};var …Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST07
MEDIUM
File type combined with upload actionesm/index.mjs:9 · File type combined with upload action — agent may exfiltrate local data files…);const fromWellKnown=await this.tryFetchJwks(ref.id,`${issuer}/.well-known/jwks.json`);if(fromWellKnown?.keys?.length)return fromWellKnown;for(const document of["oauth-authorization-server","openid-configuration"]){const meta=await this.t…Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
MEDIUM
File type combined with upload actionindex.js:1 · File type combined with upload action — agent may exfiltrate local data files…redis.host,port:config.redis.port,password:config.redis.password,db:config.redis.db,tls:config.redis.tls}}this.redis=new import_utils18.RedisStorageAdapter(redisOptions)}async connect(){await this.redis.connect()}cacheKey(clientId){const h…Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
HIGH
URL with embedded credentialsbrowser/ui/base-layout.mjs:10 · URL with embedded credentials — may be phishing or credential leakingstylesheet: "https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap"Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST07
MEDIUM
File type combined with upload actionindex.js:391 · File type combined with upload action — agent may exfiltrate local data files…fig){return typeof config==="object"&&config!==null&&"sqlite"in config&&!!config.sqlite}function isPersistentTokenStorage(config){return config!==void 0&&config!=="memory"}async function createTokenStorageAdapter(config){if(config===void 0…Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
HIGH
URL with embedded credentialsui/base-layout.d.ts:36 · URL with embedded credentials — may be phishing or credential leakingreadonly stylesheet: "https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap";Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST07
HIGH
Base64 encoding combined with network callesm/index.mjs:397 · Base64 encoding combined with network call — potential data exfiltration…(()=>controller.abort(),options.timeoutMs??DEFAULT_TIMEOUT_MS);try{return await fetch(url,{...init,redirect:"error",signal:controller.signal})}finally{clearTimeout(timer)}}function describeOAuthError(body){if(!body||typeof body!=="object")…Fix: Put hosts, commands and strings in plain source. Decoding at runtime looks identical to malware and costs points on its own.
AST07
MEDIUM
File type combined with upload actionindex.js:392 · File type combined with upload action — agent may exfiltrate local data files…import_lazy_zod7.internalZ.object({...noBacking,sqlite:secureStoreBackingSchemas.sqlite,...secureStoreCommonFields}),import_lazy_zod7.internalZ.object({...noBacking,redis:secureStoreBackingSchemas.redis,...secureStoreCommonFields}),import_…Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
MEDIUM
File type combined with upload actionindex.js:6 · File type combined with upload action — agent may exfiltrate local data files…);const fromWellKnown=await this.tryFetchJwks(ref.id,`${issuer}/.well-known/jwks.json`);if(fromWellKnown?.keys?.length)return fromWellKnown;for(const document of["oauth-authorization-server","openid-configuration"]){const meta=await this.t…Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
MEDIUM
File type combined with upload actionesm/index.mjs:394 · File type combined with upload action — agent may exfiltrate local data files…fig){return typeof config==="object"&&config!==null&&"sqlite"in config&&!!config.sqlite}function isPersistentTokenStorage(config){return config!==void 0&&config!=="memory"}async function createTokenStorageAdapter(config){if(config===void 0…Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
HIGH
URL with embedded credentialsindex.js:6 · URL with embedded credentials — may be phishing or credential leaking…lwind:"https://cdn.jsdelivr.net/npm/@tailwindcss/browser@4",fonts:{preconnect:["https://fonts.googleapis.com","https://fonts.gstatic.com"],stylesheet:"https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap"}};var …Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST07

Cost to the agent

Instructions loaded
≈64 tok
1 file · 81 in bundle

Tokens estimated at four characters each. Skills load their instruction text when triggered; the figure is what that costs.

Known vulnerabilities

No advisories in OSV for @frontmcp/auth@1.11.3 as of 3d ago. This is the package itself, not its dependencies.

What would make this Verified

5 points to 80 · weights: behavior 45%, static 25%, prompt 15%, publisher 15%
  1. Unclaimed publisher≈ +8 on the totalClaim frontmcp: a verified publisher gets +50 on publisher trust. It is free and usually instant with GitHub sign-in.
  2. Obfuscated code≈ +5 on the totalRemove base64-assembled strings, eval of decoded text and minified blobs. Reviewers and scanners both treat unreadable code as hostile.
  3. Base64 encoding combined with network call≈ +4 on the totalPut hosts, commands and strings in plain source. Decoding at runtime looks identical to malware and costs points on its own.
  4. URL with embedded credentials≈ +4 on the totalStop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
  5. File type combined with upload action≈ +2 on the totalRemove the call, or declare the host in frontmatter and explain in the README what is sent and why.
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