Netskope Extension Risk

Detail view · rubric v3.6
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Pop up blocker for Chrome™ - Poper Blocker

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Risk Score
2.98
Risk Level: Low
Recommendation: 🟢 LOW RISK — review
Category Adblock
Installs 2,000,000
Rating 4.8
Last updated 2026-08-17
Manifest version MV3
CSP present ✅ yes
Developer support@poperblocker.com
Verified publisher ✅ yes
Featured by Google ✅ yes
Privacy policy link
Web Store open ↗

Top Risks

  • eval() of variable in twitchStreamAdBlockInjectScript.js — code execution risk if workerString is attacker-controlled.
  • new Function() constructor in service-worker.js — dynamic code execution, though appears in bundled minified boilerplate.
  • broad host permission *://*/* + scripting allows content injection on every site visited.
  • webRequest over all URLs — full network observation capability across all browsing.
  • Privacy policy discloses third-party data sharing; scoped but sharing acknowledged.

Evidence

  • verified_publisher + featured store Extension is verified publisher and featured by Google; strong legitimacy signal.
  • eval_user_input crx eval(workerString) in twitchStreamAdBlockInjectScript.js — variable eval in injected worker context.
  • function_constructor crx new Function('return this') in service-worker.js — likely bundler boilerplate but flagged.
  • broad_host_permissions manifest host_permissions: *://*/* plus scripting permission — full cross-site injection capability.
  • privacy_policy_third_party store Privacy policy fetched; scoped to extension, data_collection=true, third_party_sharing=true, retention=true.
  • js_external_hosts crx 12 external hosts including analytics.poperblocker.com and app.pbapi.xyz; all appear dev-controlled or informational.
  • no_bad_hosts_no_affiliates api threat_intel shows zero bad_host_hits, affiliate_hits, and monetization_hits.
  • recently_updated_mv3 store Updated June 2026, 0 months stale, MV3, CSP present — strong maintenance posture.

Permissions Breakdown

  • storage low Stores settings locally; minimal risk.
  • activeTab low Scoped to user-activated tab only.
  • webRequest high Can observe and intercept all network requests; core to ad/popup blocking.
  • declarativeNetRequest medium Rule-based network blocking; expected for adblocker category.
  • declarativeNetRequestFeedback low Read-only feedback on DNR rules; low risk.
  • contextMenus low Adds right-click menu items; low risk.
  • scripting medium Can inject scripts into pages; paired with <all_urls> host permission.
  • webNavigation medium Observes navigation events across all tabs; standard for blockers.
  • alarms low Schedules background tasks; minimal risk.
  • *://*/* high Broad host access across all sites; expected for popup blocker but high surface area.

Pillar Scores

Permissions4.50
Reputation2.00
Network2.00
Webstore2.50
Maintenance0.00
Privacy1.00
Code Quality5.50
CVE Exposure0.00

Scoring History

fsssiedxm sssiedx 2.14 Low review 2026-08-24
fsssiedxm 2.89 Low review 2026-08-24
sssieddrubricxsx 3.05 Low review 2026-08-24
v3.6 2.98 Low review 2026-06-16

Bookkeeping

Rubric v3.6
Scored at 2026-06-16 07:20
Listing SHA e5f378be2270…
Force block — not fired
Score recovered no
Elapsed 25.5s