@exulu/backend@3.7.2
**Exulu IMP** (Intelligence Management Platform) is an open-source TypeScript framework for building production-ready AI agent applications. It provides the backend infrastructure for managing agents, semantic search contexts, background job processing, a
AI Security Review
scanned 2mo ago · by lpm-firewall-aiThis is not a concrete install-hook attack, but it packages a broad, remote-capable agent-skill installer behind an explicit runtime workflow. The lifecycle Python installer is transparent and package-local, so it does not justify a block.
Static reason
High-risk behavior combination matched malicious policy.
Trigger
npm installation triggers Python setup; an operator must request and run the runtime bootstrap tool to change agent skill directories.
Impact
The bootstrap capability can introduce or update agent skills across configured client directories, expanding an operator's agent control surface.
Mechanism
automatic Python dependency setup plus explicit multi-client agent skill installation
AI rationale
This is not a concrete install-hook attack, but it packages a broad, remote-capable agent-skill installer behind an explicit runtime workflow. The lifecycle Python installer is transparent and package-local, so it does not justify a block.
Evidence
package.jsonscripts/postinstall.cjsee/python/setup.shdist/index.jsee/python/.venv.agents/skills.claude/skills.windsurf/skills.continue/skills
Decision evidence
public snapshotAI called this Suspicious at 86.0% confidence as Dangerous Capability with medium false-positive risk.
Evidence for warning
- The package runs a postinstall script automatically.
- Postinstall launches a Bash setup script that installs Python dependencies.
- The runtime exposes a bootstrap ZIP for agent skills.
- The bootstrap targets multiple agent-client skill directories.
- The bootstrap route is only reachable when the backend runs, not during npm install.
Evidence against
- The install setup is transparent, package-local, and can be skipped with an environment variable.
- No self-dependency, fixed credential gateway, secret harvesting, or install-time agent configuration write was found.
- Remote LiteLLM mode uses an operator-provided environment URL rather than a fixed endpoint.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetworkShell
HighEntropyStringsUrlStrings
NoLicenseWildcardDependency
Source & flagged code
11 flaggedpackage.jsonView file
•scripts.preinstall = node -e "if (process.version !== 'v22.18.0') { console.error('❌ Wrong Node.js version. Expected v22.18.0, got ' + process.version); process.exit(1); }"
Critical
Red Install Lifecycle Script
Install-time lifecycle script matches a deterministic static-gate block pattern.
package.jsonView on unpkg•scripts.postinstall = node scripts/postinstall.cjs
High
Install Time Lifecycle Scripts
Package defines install-time lifecycle scripts.
package.jsonView on unpkg•scripts.postinstall = node scripts/postinstall.cjs
Medium
Ambiguous Install Lifecycle Script
Install-time lifecycle script is not statically allowlisted and needs review.
package.jsonView on unpkgbin/backend.cjsView file
9L10: const { spawn } = require('child_process');
L11: const { existsSync } = require('fs');
High
dist/index.jsView file
23577import { fileURLToPath } from "url";
L23578: var execAsync = promisify(exec);
L23579: function getPackageRoot2() {
High
•Manifest-reachable source captures an API credential, sends it to a fixed unofficial gateway, and persists that redirection in agent or shell configuration.
dist/index.js:
(req.headers["authorization"] || req.headers["x-api-key"]) ?? ""
const { baseUrl, authHeaders } = resolveLiteLLMTarget();
const endpoint = `${baseUrl}/v1/embeddings`;
// Optional attribution target for API keys (type "api"): tags requests
Some tools collect credentials (API keys, passwords, tokens) through a secure form shown directly to the user in the chat UI. Credentials are never entered in the conversation itse...
if (output && typeof output === "object" && output.oauth?.authorizationUrl) {
read them with the readFile tool. Files you produce yourself (via writeFile or via shell
this request (readFile, writeFile, bas
High
Credential Redirect Persistence
Manifest-reachable source sends a prompted API credential to a fixed unofficial gateway and persists the redirection.
dist/index.jsView on unpkg105var redisServer = {
L106: host: process.env.REDIS_HOST ?? "",
L107: port: process.env.REDIS_PORT ?? "",
...
L372: };
L373: var resolveLiteLLMConfigPath = () => process.env.LITELLM_CONFIG_PATH ?? resolve(process.cwd(), "./config.litellm.yaml");
L374: var parseEmbeddingModels = (configPath) => {
...
L530: contentType: type,
L531: metadata: {
L532: ...metadata,
...
L572: const text = this.encoder.decode(tokens);
L573: return new TextDecoder().decode(text);
L574: }
High
Command Output Exfiltration
Source combines command execution, command-output handling, and outbound requests; review data flow before blocking.
dist/index.jsView on unpkg · L105105var redisServer = {
L106: host: process.env.REDIS_HOST ?? "",
L107: port: process.env.REDIS_PORT ?? "",
...
L372: };
L373: var resolveLiteLLMConfigPath = () => process.env.LITELLM_CONFIG_PATH ?? resolve(process.cwd(), "./config.litellm.yaml");
L374: var parseEmbeddingModels = (configPath) => {
...
L530: contentType: type,
L531: metadata: {
L532: ...metadata,
...
L572: const text = this.encoder.decode(tokens);
L573: return new TextDecoder().decode(text);
L574: }
Low
Weak Crypto
Package source references weak cryptographic algorithms.
dist/index.jsView on unpkg · L105ee/python/setup.shView file
•path = ee/python/setup.sh
kind = build_helper
sizeBytes = 10741
magicHex = [redacted]
Medium
Ships Build Helper
Package ships non-JavaScript build or shell helper files.
ee/python/setup.shView on unpkgee/python/transcription/tests/test_server.pyView file
•path = ee/python/transcription/tests/test_server.py
kind = payload_in_excluded_dir
sizeBytes = 3264
magicHex = [redacted]
High
Payload In Excluded Dir
Package hides binary, compressed, or executable-looking payloads in test/fixture/hidden paths.
ee/python/transcription/tests/test_server.pyView on unpkgdist/chunk-BNTL6LYY.jsView file
•stage = ast_semantic_analysis; reason = ast_alias_growth_limit_exceeded; 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/chunk-BNTL6LYY.jsView on unpkgFindings
1 Critical7 High6 Medium7 Low
CriticalRed Install Lifecycle Scriptpackage.json
HighInstall Time Lifecycle Scriptspackage.json
HighChild Processbin/backend.cjs
HighShelldist/index.js
HighCredential Redirect Persistencedist/index.js
HighCommand Output Exfiltrationdist/index.js
HighPayload In Excluded Diree/python/transcription/tests/test_server.py
HighSemantic Analysis Limiteddist/chunk-BNTL6LYY.js
MediumAmbiguous Install Lifecycle Scriptpackage.json
MediumNetwork
MediumEnvironment Vars
MediumShips Build Helperee/python/setup.sh
MediumStructural Risk Force Deep Review
MediumWildcard Dependency
LowNon Install Lifecycle Scripts
LowScripts Present
LowWeak Cryptodist/index.js
LowFilesystem
LowHigh Entropy Strings
LowUrl Strings
LowNo License
Affected versions and remediation
This report applies to @exulu/backend@3.7.2.
See all versions of @exulu/backend for other recorded verdicts.
- Review the evidence and your use of @exulu/backend@3.7.2 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: .
Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.