registry / @exulu/backend / 5.3.0
@exulu/backend@5.3.0
**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 20d ago · by lpm-firewall-aiInspected source resolves the credential and agent-integration hints to configured service calls and user-directed skill setup. The lifecycle hook has a scoped dependency-removal side effect, but the reviewed source does not establish malicious behavior.
Static reason
High-risk behavior combination matched malicious policy.; previous stored version diff introduced dangerous source
Trigger
npm installation runs the package setup hook; agent skill installation requires use of the helper's install or update command.
Impact
No credential theft, unauthorized agent control change, or other concrete attack was established.
Mechanism
The hook sets up the package's Python environment and removes a hoisted node-liblzma copy unless configured to keep it. The agent endpoint serves a skill archive whose helper uses the configured backend and selected client directories.
AI rationale
Inspected source resolves the credential and agent-integration hints to configured service calls and user-directed skill setup. The lifecycle hook has a scoped dependency-removal side effect, but the reviewed source does not establish malicious behavior.
Decision evidence
public snapshotAI called this Clean at 92.0% confidence as Benign with low false-positive risk.
Evidence for AI clean decision
- The manifest runs a Node version check at preinstall and calls the Python setup script at postinstall; that script removes only a hoisted node-liblzma copy unless an environment variable opts to keep it.
- The agent bootstrap route serves a zip containing the package's skill helper. The helper's documented install and update commands act on agent clients, and setup asks the user to choose the backend URL, API key, clients, and copy or symlink mode.
- The client paths are skill directories. The reported ai.open.de host appears as an example of the user's instance URL, while service requests use configured targets.
- Session-file access requires an active session and upload configuration, rejects path-like filenames, and derives the object key from the session and owner.
- The remaining flagged paths show a test stub, explicit grants before sandbox variable access, and bundled CLI setup dispatch; they do not establish an attack.
Evidence against
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetworkShell
HighEntropyStringsUrlStrings
NoLicenseWildcardDependency
Source & flagged code
12 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
bin/setup-python.cjsView file
13L14: const execAsync = promisify(exec);
L15:
High
dist/chunk-PU3LGCBR.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-PU3LGCBR.jsView on unpkg43// src/exulu/litellm/supervisor.ts
L44: import { spawn } from "child_process";
L45: import { existsSync } from "fs";
...
L62: };
L63: var isLiteLLMEnabled = () => process.env.EXULU_USE_LITELLM === "true";
L64: var resolveConfig = (packageRoot) => {
...
L67: const masterKey = process.env.LITELLM_MASTER_KEY;
L68: const configPath = process.env.LITELLM_CONFIG_PATH ?? resolve(process.cwd(), "./config.litellm.yaml");
L69: const venvBin = resolve(packageRoot, "ee/python/.venv/bin");
...
L75: var pollHealth = async (host, port) => {
L76: const url = `http://${host}:${port}/health/liveliness`;
L77: const deadline = Date.now() + READY_TIMEOUT_MS;
Low
Weak Crypto
Package source references weak cryptographic algorithms.
dist/chunk-PU3LGCBR.jsView on unpkg · L43dist/index.jsView file
•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"]) ?? ""
import { mkdtemp, readFile, rm, writeFile } from "fs/promises";
await writeFile(mdPath, markdown, "utf-8");
await writeFile(docxPath, docxBytes);
var recallPublicBaseUrl = () => (process.env.BACKEND || process.env.PUBLIC_API_BASE_URL)?.replace(/\/$/, "");
var recallEnabled = () => recallRegion() !== null && !!recallApiKey() && !!recallVerificationSecret() && !!recallPublicBaseUrl();
var recallApiBaseUrl = () => {
const base = recallPublicBaseUrl();
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 unpkg210var redisServer = {
L211: host: process.env.REDIS_HOST ?? "",
L212: port: process.env.REDIS_PORT ?? "",
...
L419: // src/exulu/markdown-export.ts
L420: import { execFile } from "child_process";
L421: import { mkdtemp, readFile, rm, writeFile } from "fs/promises";
...
L895: const teams = rbacRecords.filter((r) => r.access_type === "Team")?.map((r) => ({ id: r.team_id, rights: r.rights }));
L896: let type = rights_mode || "private";
L897: if (type === "users" && users.length === 0) type = "private";
...
L1226: item_name: chunk2.item_name,
L1227: chunk_metadata: chunk2.metadata
L1228: }));
High
Command Output Exfiltration
Source combines command execution, command-output handling, and outbound requests; review data flow before blocking.
dist/index.jsView on unpkg · L210ee/python/setup.shView file
•path = ee/python/setup.sh
kind = build_helper
sizeBytes = 13359
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 unpkgee/invoke-skills/create-sandbox.tsView file
•matchType = previous_version_dangerous_delta
matchedPackage = @exulu/backend@5.2.0
matchedIdentity = npm:QGV4dWx1L2JhY2tlbmQ:5.2.0
similarity = 0.981
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.
ee/invoke-skills/create-sandbox.tsView on unpkgFindings
2 Critical7 High6 Medium7 Low
CriticalRed Install Lifecycle Scriptpackage.json
CriticalPrevious Version Dangerous Deltaee/invoke-skills/create-sandbox.ts
HighInstall Time Lifecycle Scriptspackage.json
HighChild Processbin/backend.cjs
HighShellbin/setup-python.cjs
HighCredential Redirect Persistencedist/index.js
HighCommand Output Exfiltrationdist/index.js
HighPayload In Excluded Diree/python/transcription/tests/test_server.py
HighSemantic Analysis Limiteddist/chunk-PU3LGCBR.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/chunk-PU3LGCBR.js
LowFilesystem
LowHigh Entropy Strings
LowUrl Strings
LowNo License
Affected versions and remediation
This report applies to @exulu/backend@5.3.0.
See all versions of @exulu/backend for other recorded verdicts.
- Review the evidence and your use of @exulu/backend@5.3.0 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: .
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