Netskope Extension Risk

Detail view · rubric v3.6
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Risk Score
8.12
Risk Level: Critical
Recommendation: 🚫 BLOCK
Category DeveloperTools
Installs
Rating
Last updated
Manifest version MV?
CSP present ❌ no
Developer
Verified publisher ❌ no
Featured by Google ❌ no
Web Store open ↗

Top Risks

  • Abandoned MV2 extension (59 months stale) with maximum-privilege stack: debugger+proxy+webRequest+nativeMessaging+<all_urls>.
  • nativeMessaging to unrecognized companion app creates arbitrary code execution path to host OS.
  • eval_user_input and function_constructor in content/popup scripts allow dynamic code execution across all sites.
  • cookies+<all_urls>+webRequestBlocking enables full session hijack and traffic manipulation on any site.
  • Privacy policy not scoped to this extension; third-party silence unresolved; no retention disclosure.

Evidence

  • maintenance_critical store Last updated Sep 2021; 59 months stale. MV2 extension past Chrome deprecation window.
  • high_perm_stack manifest debugger+proxy+webRequest+webRequestBlocking+nativeMessaging+cookies+<all_urls> — maximum capability surface.
  • native_messaging_unrecognized crx nativeMessaging present, publisher_recognized=false. Unvetted native app bridge adds OS-level risk.
  • eval_findings crx function_constructor in content_script.js and eval_user_input in popup.js — dynamic code execution confirmed.
  • unsafe_eval_csp manifest CSP allows 'unsafe-eval' on script-src, amplifying eval risk.
  • uninstall_url_hijack crx chrome.runtime.setUninstallURL() set; target null but hook present.
  • privacy_policy_inadequate api Policy fetched but scope_extension=false, data_collection=false, retention=false, third_party_silence=true.
  • small_install_high_perm store Only 422 installs with maximum-tier permissions; tail attack surface anomaly flagged.

Permissions Breakdown

  • bookmarks medium Access to full bookmark tree; medium sensitivity.
  • clipboardRead medium Reads clipboard; can capture sensitive copied data.
  • clipboardWrite medium Writes clipboard; can inject data into user workflow.
  • cookies high Full cookie access across all sites paired with <all_urls>; ×1.2 amplifier applies.
  • debugger high Can attach debugger to any tab, intercept/modify traffic, capture credentials.
  • downloads medium Can initiate and manage downloads silently.
  • downloads.shelf low UI control only; low standalone risk.
  • notifications low System notifications; minor risk.
  • storage low Local extension storage; low risk.
  • tabs medium Can enumerate all open tabs and their URLs.
  • proxy high Can reroute all browser traffic through arbitrary proxy.
  • webRequest high Intercept and inspect all HTTP requests across all URLs.
  • webRequestBlocking high Modify or block any HTTP request; combined with <all_urls> is maximum-risk.
  • nativeMessaging high Bridge to unrecognized native app; publisher_recognized=false adds +3.0.
  • contextMenus low Adds context menu items; low standalone risk.
  • <all_urls> high Content scripts injected into every site; broadest possible host access.

Pillar Scores

Permissions10.00
Reputation4.00
Network6.00
Webstore5.50
Maintenance10.00
Privacy9.00
Code Quality7.50
CVE Exposure0.00

Scoring History

"dfbzzzzzzzzbbbccccdddeeexca".replace("z","o") 7.69 High block 2026-08-05
1}}"}}'}}1%>"%>'%><%={{={@{#{${dfb}}%> 6.86 High block 2026-08-05
v3.6&n971973=v961763 8.16 Critical block 2026-08-05
v3.6 8.12 Critical block 2026-08-03

Bookkeeping

Rubric v3.6
Scored at 2026-08-03 07:21
Listing SHA f95ecbefe710…
Force block — not fired
Score recovered no
Elapsed