Netskope Extension Risk

Detail view · rubric v3.6
← Back to catalog

Browser Boost - Extra Tools for Chrome

kfjlgmbnpnpmkfgbnbfbcjleglenkkap
Risk Score
6.35
Risk Level: High
Recommendation: 🚫 BLOCK
Category Productivity
Installs 1,000
Rating 3.7
Last updated 2025-04-30 (18 months ago)
Manifest version MV3
CSP present ❌ no
Developer mac68687@gmail.com
Verified publisher ❌ no
Featured by Google ✅ yes
Privacy policy link
Web Store open ↗

Top Risks

  • HIGH permissions (privacy, tabCapture, declarativeNetRequestWithHostAccess) with <all_urls> host access
  • No Content Security Policy with DOM-XSS sink detected in popup.bundle.js
  • Free webmail developer (gmail.com) with no verified publisher status
  • 18 months since last update indicates potential abandonment
  • Small install base (1,000) with high-tier permissions creates tail attack surface

Evidence

  • permissions manifest tabCapture, privacy, declarativeNetRequestWithHostAccess, <all_urls>
  • no_csp crx content_security_policy is null with dom_sink_innerhtml_userctrl finding
  • developer_identity store Free gmail developer, not verified, no business website
  • staleness store 18 months since update, install_perm_anomaly.tail_attack_surface=true
  • dom_xss_sink crx innerHTML assignment from variable in popup.bundle.js (React 16.13.1)
  • privacy_policy api Scoped policy found but retention not disclosed, third_party_silence=true

Permissions Breakdown

  • tabCapture high Can capture tab content including audio/video streams
  • privacy high Can modify browser privacy settings
  • webNavigation medium Can monitor navigation events across all sites
  • scripting medium Can inject scripts into web pages
  • downloads medium Can download files to user's system
  • declarativeNetRequestWithHostAccess high Can intercept and modify network requests on all URLs
  • offscreen low Can run code in offscreen documents
  • storage low Local storage access
  • contextMenus low Can add context menu items
  • <all_urls> high Broad host access to all websites

Pillar Scores

Permissions7.50
Reputation7.50
Network4.50
Webstore1.50
Maintenance6.00
Privacy1.00
Code Quality2.00
CVE Exposure0.00

Bookkeeping

Rubric v3.6
Scored at 2026-10-23 05:28
Listing SHA cf2e3a5be4df…
Force block — not fired
Score recovered no
Elapsed —