Summary
mcpland/webpage-mcp v2026-03-22 was classified as CRITICAL RISK with a risk score of 587. Sigil detected 42 findings across 650 files, covering phases including provenance, network exfiltration, code patterns, obfuscation, install hooks. Review the findings below before installing this package.
Package description: Turn your existing webpages into an MCP server for agent control
v2026-03-22
23 March 2026, 00:00 UTC
by Sigil Bot
Risk Score
587
Findings
42
Files Scanned
650
Provenance
Repository
https://github.com/mcpland/webpage-mcpScanned From
https://github.com/mcpland/webpage-mcp.gitFindings by Phase
Phase Ordering
Phases are ordered by criticality, with the most dangerous at the top. Click any phase header to expand or collapse its findings. Critical phases are expanded by default.
install-npm-postinstall
CRITICALnpm lifecycle script — runs automatically on install
repo/app/chrome-extension/package.json:17
"i18n:check": "node ./scripts/validate-i18n.mjs",
"postinstall": "wxt prepare",
"lint": "npx eslint . && pnpm run i18n:check",Why was this flagged?
npm lifecycle scripts like postinstall run automatically during package installation with no user interaction required. This is the #1 attack vector for malicious npm packages — attackers embed data theft or backdoor installation in these hooks. Rated CRITICAL because code executes before the developer can review it.
install-npm-postinstall
CRITICALnpm lifecycle script — runs automatically on install
repo/app/mcp-server/package.json:19
"register:dev": "node dist/scripts/register-dev.js",
"postinstall": "node -e \"const fs=require('fs');const cp=require('child_process');const dist='dist/scripts/postinstall.js';if(!fs.existsSync(dist)){console.log('Skipping mcp-server postinstall in source workspace (dist not found).');process.exit(0);}const r=cp.spawnSync(process.execPath,[dist],{stdio:'inherit'});if(r.error)throw r.error;process.exit(r.status??1);\""
},Why was this flagged?
npm lifecycle scripts like postinstall run automatically during package installation with no user interaction required. This is the #1 attack vector for malicious npm packages — attackers embed data theft or backdoor installation in these hooks. Rated CRITICAL because code executes before the developer can review it.
install-makefile-curl
HIGHMakefile/script pipes remote content to shell
repo/packages/wasm-simd/BUILD.md:9
# Install Rust
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
Why was this flagged?
A script or Makefile pipes content from a remote URL directly into a shell (curl | sh or wget | bash). This is inherently dangerous because the remote content can change at any time, and the command runs with the current user's permissions. Rated HIGH because it requires manual execution (unlike install hooks) but still executes arbitrary remote code.
install-makefile-curl
HIGHMakefile/script pipes remote content to shell
repo/packages/wasm-simd/BUILD.md:12
# Install wasm-pack
curl https://rustwasm.github.io/wasm-pack/installer/init.sh -sSf | sh
```Why was this flagged?
A script or Makefile pipes content from a remote URL directly into a shell (curl | sh or wget | bash). This is inherently dangerous because the remote content can change at any time, and the command runs with the current user's permissions. Rated HIGH because it requires manual execution (unlike install hooks) but still executes arbitrary remote code.
Badge
Markdown
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