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suppa-mcp-2@1.21.0: AI-agent control-surface risk | LPM Firewall

registry / suppa-mcp-2 / 1.21.0

suppa-mcp-2@1.21.0

MCP server for the Suppa platform (modern.suppa.me) — Tasks, Docs/Pages, Entities & Schema, Forms, Automations, and file attachments, with multi-tenant Google auth. Node port of PyPI suppa-mcp.

AI Security Review

scanned 3h ago · by lpm-firewall-ai

LPM flags this version as an AI-agent control-surface risk. Installing the package can alter a qualifying consumer repository without an explicit setup command. It installs persistent AI-agent hooks and repository enforcement files.

Static reason

One or more suspicious static signals were detected.; source matched previously finalized malicious package; routed for review

Trigger

npm automatically runs postinstall during installation in a project that the package identifies as a Suppa application.

Impact

The package gains control over future agent edits, stop events, commits, and repository workflows.

Mechanism

Postinstall invokes an installer that writes agent hooks, instruction files, Git hooks, CI configuration, and a package script.

Policy narrative

A normal npm installation automatically invokes the package postinstall script. When its project checks pass, that script launches an installer against the consumer repository. The installer adds Claude Code hooks for write and stop events, injects agent instruction files, installs a Git hook, writes GitLab CI configuration, and changes package.json. These mutations persist beyond installation and control broad agent and development actions without an explicit user setup command.

Rationale

The source establishes an automatic postinstall path that broadly mutates foreign repository and AI-agent control surfaces. The guard conditions do not convert this automatic behavior into explicit consent.

Evidence

package.jsonskills/suppa-entity-code/scripts/postinstall.mjsskills/suppa-entity-code/scripts/install-entity-code-guards.mjs.claude/settings.jsonAGENTS.mdCLAUDE.md

Source & flagged code

6 flagged · loading source

package.jsonView file

•scripts.postinstall = node skills/suppa-entity-code/scripts/postinstall.mjs

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•scripts.postinstall = node skills/suppa-entity-code/scripts/postinstall.mjs

Medium

Ambiguous Install Lifecycle Script

Install-time lifecycle script is not statically allowlisted and needs review.

package.jsonView on unpkg

dist/tools/entityCode.jsView file

81try { L82: const mod = await import(pathToFileURL(p).href); L83: return String(mod.BLOCKING_SUMMARY ?? "").trim() || "the house rules in SKILL.md";

Medium

Dynamic Require

Package source references dynamic require/import behavior.

dist/tools/entityCode.jsView on unpkg · L81

dist/version.jsView file

•Manifest-reachable source resolves another installed package, overwrites its runtime code, and injects package-defined remote behavior. dist/version.js: * node_modules holds; publishing a fix changes nothing until that client is import { mkdirSync, readFileSync, renameSync, writeFileSync } from "node:fs"; const REGISTRY_URL = `https://registry.npmjs.org/${PACKAGE_NAME}/latest`; writeFileSync(tmp, `${JSON.stringify(cache, null, 2)}\n`, "utf-8");

High

Entrypoint Foreign Package Code Overwrite

Manifest-reachable source overwrites another installed package with package-defined remote behavior.

dist/version.jsView on unpkg

dist/auth.jsView file

•matchType = normalized_sha256 matchedPackage = suppa-mcp-2@1.20.0 matchedPath = dist/auth.js matchedIdentity = npm:c3VwcGEtbWNwLTI:1.20.0 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

dist/auth.jsView on unpkg

dist/tools/files.jsView file

•matchType = normalized_sha256 matchedPackage = suppa-mcp-2@1.20.0 matchedPath = dist/tools/files.js matchedIdentity = npm:c3VwcGEtbWNwLTI:1.20.0 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

dist/tools/files.jsView on unpkg

Source & flagged code

6 flagged

package.jsonView file

Lines 7-47json

7 "suppa-mcp": "dist/bin.js",

8 "suppa-entity-guards": "skills/suppa-entity-code/scripts/install-entity-code-guards.mjs"

9 },

10 "main": "dist/bin.js",

11 "files": [

12 "dist",

13 "skills",

14 "README.md",

15 "LICENSE"

16 ],

17 "engines": {

18 "node": ">=18"

19 },

20 "scripts": {

21 "build": "tsc",

22 "clean": "node -e \"require('fs').rmSync('dist',{recursive:true,force:true})\"",

23 "rebuild": "npm run clean && npm run build",

24 "start": "node dist/bin.js",

25 "dev": "tsc --watch",

26 "test": "node scripts/check-version-literals.mjs && vitest run",

27 "postinstall": "node skills/suppa-entity-code/scripts/postinstall.mjs",

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg · L27

Medium

Ambiguous Install Lifecycle Script

Install-time lifecycle script is not statically allowlisted and needs review.

package.jsonView on unpkg · L27

28 "test:watch": "vitest",

29 "prepublishOnly": "npm run build && npm test",

30 "inspect": "npx @modelcontextprotocol/inspector node dist/bin.js",

31 "schema:gate": "node skills/suppa-entity-code/scripts/entity-code-guard.mjs --ci .",

32 "guards:install": "node skills/suppa-entity-code/scripts/install-entity-code-guards.mjs"

33 },

34 "keywords": [

35 "mcp",

36 "model-context-protocol",

37 "suppa",

38 "modern-expo",

39 "ai",

40 "llm",

41 "tools",

42 "claude",

43 "copilot",

44 "cursor"

45 ],

46 "license": "MIT",

47 "repository": {

dist/tools/entityCode.jsView file

Lines 61-101javascript

61 .split("\\$")

62 .join("$");

63 }

64 catch {

65 return "";

66 }

dist/version.jsView file

•Manifest-reachable source resolves another installed package, overwrites its runtime code, and injects package-defined remote behavior. dist/version.js: * node_modules holds; publishing a fix changes nothing until that client is import { mkdirSync, readFileSync, renameSync, writeFileSync } from "node:fs"; const REGISTRY_URL = `https://registry.npmjs.org/${PACKAGE_NAME}/latest`; writeFileSync(tmp, `${JSON.stringify(cache, null, 2)}\n`, "utf-8");

High

Entrypoint Foreign Package Code Overwrite

Manifest-reachable source overwrites another installed package with package-defined remote behavior.

dist/version.jsView on unpkg

dist/auth.jsView file

•matchType = normalized_sha256 matchedPackage = suppa-mcp-2@1.20.0 matchedPath = dist/auth.js matchedIdentity = npm:c3VwcGEtbWNwLTI:1.20.0 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

dist/auth.jsView on unpkg

dist/tools/files.jsView file

•matchType = normalized_sha256 matchedPackage = suppa-mcp-2@1.20.0 matchedPath = dist/tools/files.js matchedIdentity = npm:c3VwcGEtbWNwLTI:1.20.0 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

dist/tools/files.jsView on unpkg