wechat-bro@1.6.15
AI agent interface for WeChat Web — send/receive messages, manage contacts, upload media, transcribe voice
AI Security Review
scanned 26d ago · by lpm-firewall-aiThe install hook performs package-aligned browser setup, while agent instructions are written only during explicit orchestrator use. This is a guarded, user-invoked agent configuration capability, so it warrants a warning rather than a block.
Static reason
High-risk behavior combination matched malicious policy.
Trigger
A user starts the CLI with the orchestrator command and dispatches an agent task.
Impact
An agent in that working directory may read the configured instructions; no covert install-time modification or remote control hijack was identified.
Mechanism
The orchestrator creates or replaces AGENTS.md in the selected working directory with a symlink to the configured agent file, falling back to a copy.
AI rationale
The install hook performs package-aligned browser setup, while agent instructions are written only during explicit orchestrator use. This is a guarded, user-invoked agent configuration capability, so it warrants a warning rather than a block.
Evidence
package.jsonsrc/orchestrator.jssrc/cli.jsAGENTS.md
Decision evidence
public snapshotAI called this Suspicious at 89.0% confidence as Dangerous Capability with medium false-positive risk.
Evidence for warning
- The postinstall hook installs Chrome into the package's own ~/.wechat-bro/chromium directory.
- In explicit orchestrator mode, the program creates or replaces AGENTS.md in each agent working directory with a link or copy of the configured agent file.
- The orchestrator dispatches tasks through agent harnesses after setting up the working directory.
- Media upload obtains parameters and sends them through the WeChat page flow.
Evidence against
- The installation hook is scoped to Puppeteer's Chrome setup; the inspected command does not show a consumer policy or agent configuration write.
- The agent configuration write is reached through the explicit local orchestrator command, rather than an npm lifecycle hook.
- The inspected upload flow is part of sending media through the WeChat interface.
Behavioral surface
ChildProcessEnvironmentVarsFilesystemNetworkShellWebSocket
Source & flagged code
6 flaggedpackage.jsonView file
•scripts.postinstall = node -e "const p=require('path'),o=require('os'),d=p.join(o.homedir(),'.wechat-bro','chromium');process.env.PUPPETEER_CACHE_DIR=d;const pup=require('puppeteer');(async()=>{try{awai...
Critical
Red Install Lifecycle Script
Install-time lifecycle script matches a deterministic static-gate block pattern.
package.jsonView on unpkg•scripts.postinstall = node -e "const p=require('path'),o=require('os'),d=p.join(o.homedir(),'.wechat-bro','chromium');process.env.PUPPETEER_CACHE_DIR=d;const pup=require('puppeteer');(async()=>{try{awai...
High
Install Time Lifecycle Scripts
Package defines install-time lifecycle scripts.
package.jsonView on unpkgsrc/upload.jsView file
10L11: const { execFileSync } = require('child_process')
L12: const fs = require('fs')
High
Child Process
Package source references child process execution.
Findings
1 Critical5 High3 Medium4 Low
CriticalRed Install Lifecycle Scriptpackage.json
HighInstall Time Lifecycle Scriptspackage.json
HighChild Processsrc/upload.js
HighShellsrc/cli.js
HighRuntime Package Installsrc/cli.js
HighSemantic Analysis Limitedsrc/upload.js#virtual:normalized:round1
MediumNetwork
MediumEnvironment Vars
MediumStructural Risk Force Deep Review
LowScripts Present
LowFilesystem
LowHigh Entropy Strings
LowUrl Strings
Affected versions and remediation
This report applies to wechat-bro@1.6.15.
See all versions of wechat-bro for other recorded verdicts.
- Review the evidence and your use of wechat-bro@1.6.15 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.