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suppa-mcp-2@1.21.2: AI-agent control-surface risk | LPM Firewall

registry / suppa-mcp-2 / 1.21.2

suppa-mcp-2@1.21.2

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 2h ago · by lpm-firewall-ai

LPM flags this version as an AI-agent control-surface risk. Installing the package can alter the consuming repository's AI-agent control surface. It registers package commands as Claude Code hooks and adds agent instruction files without an explicit setup command.

Static reason

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

Trigger

npm install in a project that the script identifies as a Suppa application

Impact

Package code can run during future agent write and stop events, while injected instructions influence agent behavior in the consumer repository.

Mechanism

Postinstall-driven consumer-project AI-agent hook and configuration mutation

Policy narrative

During npm installation, the postinstall script targets the initiating project and, when it detects Suppa-related code, launches an installer against that project. The installer writes Claude Code PreToolUse, PostToolUse, and Stop hooks that execute package-owned code. It also creates or modifies AGENTS.md and CLAUDE.md, installs a Git hook and CI file, and rewrites package.json. These are automatic changes to a foreign project's agent-control and development surfaces rather than an explicit user-invoked setup action.

Rationale

The package has a concrete, automatic postinstall chain that mutates a consuming project's broad AI-agent control surface. This meets the install-control-surface blocking policy even though no secret exfiltration was established.

Evidence

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

Source & flagged code

8 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/tools/files.js#virtual:normalized:round1View file

•stage = ast_semantic_analysis; reason = ast_parse_error; limitedFiles = 4

High

Semantic Analysis Limited

A bounded semantic-analysis stage reached its safety limit; remaining detectors completed, but this package requires AI review.

dist/tools/files.js#virtual:normalized:round1View on unpkg

dist/auth.jsView file

•matchType = normalized_sha256 matchedPackage = suppa-mcp-2@1.21.0 matchedPath = dist/auth.js matchedIdentity = npm:c3VwcGEtbWNwLTI:1.21.0 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

•matchType = malicious_source_fingerprint_signature signature = 7a34aacea5f1c5d2 signatureType = suspicious_hashes sourceLabel = final_verdict:malicious matchedPackage = suppa-mcp-2@1.21.1 matchedPath = dist/auth.js matchedIdentity = npm:c3VwcGEtbWNwLTI:1.21.1 similarity = 1.000 shingleOverlap = 18 summary = package final verdict is malicious

High

Known Malware Source Fingerprint Signature

Source fingerprint signature matches a known malicious package signature; route for source-aware review.

dist/auth.jsView on unpkg

dist/tools/files.jsView file

•matchType = normalized_sha256 matchedPackage = suppa-mcp-2@1.21.0 matchedPath = dist/tools/files.js matchedIdentity = npm:c3VwcGEtbWNwLTI:1.21.0 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

8 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 rebuild && 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/tools/files.js#virtual:normalized:round1View file

•stage = ast_semantic_analysis; reason = ast_parse_error; limitedFiles = 4

High

Semantic Analysis Limited

A bounded semantic-analysis stage reached its safety limit; remaining detectors completed, but this package requires AI review.

dist/tools/files.js#virtual:normalized:round1View on unpkg

dist/auth.jsView file

•matchType = normalized_sha256 matchedPackage = suppa-mcp-2@1.21.0 matchedPath = dist/auth.js matchedIdentity = npm:c3VwcGEtbWNwLTI:1.21.0 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

•matchType = malicious_source_fingerprint_signature signature = 7a34aacea5f1c5d2 signatureType = suspicious_hashes sourceLabel = final_verdict:malicious matchedPackage = suppa-mcp-2@1.21.1 matchedPath = dist/auth.js matchedIdentity = npm:c3VwcGEtbWNwLTI:1.21.1 similarity = 1.000 shingleOverlap = 18 summary = package final verdict is malicious

High

Known Malware Source Fingerprint Signature

Source fingerprint signature matches a known malicious package signature; route for source-aware review.

dist/auth.jsView on unpkg

dist/tools/files.jsView file

•matchType = normalized_sha256 matchedPackage = suppa-mcp-2@1.21.0 matchedPath = dist/tools/files.js matchedIdentity = npm:c3VwcGEtbWNwLTI:1.21.0 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