registry / Credential exfiltration / hostinger-api-mcp / 1.51.1

hostinger-api-mcp@1.51.1

MCP server for Hostinger API

AI Security Review

scanned 6d ago · by lpm-firewall-ai

The default endpoints are Hostinger services, but API_BASE_URL and OAUTH_ISSUER accept alternate destinations without binding the credentials to those services. Because runtime calls can send existing bearer or refresh tokens there, this is a conditional credential exposure risk warranting a warning.

Static reason

One or more suspicious static signals were detected.; previous stored version diff introduced dangerous source

Trigger

A user configures API_BASE_URL or OAUTH_ISSUER and invokes a tool or triggers a refresh of saved credentials.

Impact

A misconfigured or untrusted endpoint could receive an access or refresh token. No install-time transfer was identified.

Mechanism

The runtime attaches its bearer token to requests for API_BASE_URL, while OAuth sends a saved refresh token to OAUTH_ISSUER without validating the destination.

AI rationale

Evidence

src/core/runtime.jssrc/core/oauth.js

Network endpoints2

developers.hostinger.comauth.hostinger.com

Decision evidence

public snapshot

AI called this Suspicious at 92.0% confidence as Dangerous Capability with medium false-positive risk.

Evidence for warning

The OAuth issuer can be replaced through OAUTH_ISSUER, and the default is Hostinger’s authentication service.
When saved credentials need refreshing, the refresh token is sent to the configured issuer without a destination allowlist.
API_BASE_URL can replace the Hostinger API default; runtime requests attach the bearer token and send to that URL when a tool is called.
The token transfer is conditional on runtime authentication or a tool request; the manifest has no install lifecycle hook, and the build script invokes the TypeScript compiler.

Evidence against

The defaults point to Hostinger services, and the endpoint overrides require explicit environment configuration.
The package manifest exposes runtime server commands but no preinstall, install, or postinstall command.

Behavioral surface

Source

ChildProcessCryptoEnvironmentVarsFilesystemNetworkShell

Supply chain

HighEntropyStrings

Source & flagged code

4 flagged

build.jsView file

Lines 1-38javascript

1#!/usr/bin/env node

3import { exec } from 'child_process';

4import fs from 'fs';

High

Child Process

Package source references child process execution.

build.jsView on unpkg · L2

5import path from 'path';

6import { fileURLToPath } from 'url';

8// Get proper paths for ES modules

9const __filename = fileURLToPath(import.meta.url);

10const __dirname = path.dirname(__filename);

12// Ensure dist directory exists

13if (!fs.existsSync('./dist')) {

14 fs.mkdirSync('./dist');

15}

17// Run TypeScript compiler

18console.log('Compiling TypeScript...');

19exec('npx tsc', (error, stdout, stderr) => {

20 if (error) {

High

Runtime Package Install

Package source invokes a package manager install command at runtime.

build.jsView on unpkg · L18

21 console.error('Error compiling TypeScript:', error);

22 console.error(stderr);

23 process.exit(1);

24 }

26 if (stdout) {

27 console.log(stdout);

28 }

30 console.log('TypeScript compilation successful');

32 // Copy .env.example to dist

33 try {

34 if (fs.existsSync('./.env.example')) {

35 fs.copyFileSync('./.env.example', './dist/.env.example');

36 console.log('Copied .env.example to dist directory');

37 }

src/core/oauth.jsView file

•matchType = previous_version_dangerous_delta matchedPackage = hostinger-api-mcp@1.57.0 matchedIdentity = npm:aG9zdGluZ2VyLWFwaS1tY3A:1.57.0 similarity = 0.804 summary = stored previous version shares package body but lacks this dangerous source file

Critical

Previous Version Dangerous Delta

This package version adds a dangerous source file absent from the previous stored version; route for source-aware review.

src/core/oauth.jsView on unpkg

58export class OAuthProvider { constructor(issuerBaseUrl) { this.issuer = ( issuerBaseUrl || process.env["OAUTH_ISSUER"] || DEFAULT_ISSUER ).replace(/\/$/, ""); this._loginInProgress = null;

Medium

Ai Review Evidence

The OAuth issuer can be replaced through OAUTH_ISSUER, and the default is Hostinger’s authentication service.

src/core/oauth.jsView on unpkg · L58

Source & flagged code

4 flagged · loading source

build.jsView file

2L3: import { exec } from 'child_process'; L4: import fs from 'fs';

High

Child Process

Package source references child process execution.

build.jsView on unpkg · L2

18console.log('Compiling TypeScript...'); L19: exec('npx tsc', (error, stdout, stderr) => { L20: if (error) {

High

Runtime Package Install

Package source invokes a package manager install command at runtime.

build.jsView on unpkg · L18

src/core/oauth.jsView file

Critical

Previous Version Dangerous Delta

This package version adds a dangerous source file absent from the previous stored version; route for source-aware review.

src/core/oauth.js

Findings

1 Critical3 High4 Medium4 Low

CriticalPrevious Version Dangerous Deltasrc/core/oauth.js

HighChild Processbuild.js

HighShell

HighRuntime Package Installbuild.js

MediumNetwork

MediumEnvironment Vars

MediumStructural Risk Force Deep Review

MediumAi Review Evidencesrc/core/oauth.js

LowScripts Present

LowFilesystem

LowHigh Entropy Strings

LowUrl Strings

Affected versions and remediation

This report applies to hostinger-api-mcp@1.51.1.

See all versions of hostinger-api-mcp for other recorded verdicts.

Review the evidence and your use of hostinger-api-mcp@1.51.1 before allowing it. Restrict the permissions described in this report.
Choose an independently verified alternative or release. This report does not establish that other versions are safe.

Evidence last updated: 2026-10-17 08:02:48.043Z (UTC).

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