Netskope Extension Risk

Detail view · rubric v3.6
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Reader Mode

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Risk Score
4.11
Risk Level: Medium
Recommendation: 🟡 MEDIUM RISK — review
Category ReaderMode
Installs 100,000
Rating 2.4
Last updated 2025-11-29 (11 months ago)
Manifest version MV3
CSP present ✅ yes
Developer ryzalyusoff@gmail.com
Verified publisher ✅ yes
Featured by Google ✅ yes
Privacy policy link
Web Store open ↗

Top Risks

  • jQuery 1.9.1 bundles 3 medium CVEs (XSS); fixed versions available since 2019–2020; library not updated.
  • dom_sink_innerhtml_userctrl in readability.js combined with CVEs elevates DOM-XSS risk on all visited pages.
  • Free-webmail developer (gmail) with no developer name listed; privacy policy not scoped to this extension.
  • install_url_hijack and uninstall_url_hijack flags set; onInstalled opens third-party URL.
  • Privacy policy admits data collection but not scoped to extension; no retention period disclosed.

Evidence

  • jquery_cve_bundle crx jquery@1.9.1 bundles CVE-2019-11358, CVE-2020-11023, CVE-2015-9251 (all medium XSS); fixed in 3.5.0.
  • install_url_hijack crx install_url_hijack=true; onInstalled opens third-party URL — minor but noted monetization signal.
  • uninstall_url_hijack crx Uninstall redirects to https://forms.gle/wVjk1u9mnn9PoNA39 — survey page, low threat but flagged.
  • free_webmail_dev_no_name store Developer email ryzalyusoff@gmail.com; developer_name empty; verified_publisher=true mitigates partially.
  • privacy_policy_not_scoped api Policy fetched; scope_extension=false, data_collection=true, third_party_sharing=false, retention=false.
  • dom_sink_plus_cve crx dom_sink_innerhtml_userctrl in readability.js + active jQuery CVEs elevate DOM-XSS risk.
  • function_constructor crx new Function() in pdf.js and pdf.worker.js — PDF.js feature-detect pattern, lower exploitation risk.
  • broad_host_access manifest <all_urls> host_permissions + content_scripts on all URLs; justified for ReaderMode category.

CVE Exposures (3)

CVELibrarySeverity Fixed inSummary
CVE-2019-11358 jquery@1.9.1 medium 3.4.0 XSS in jQuery as used in Drupal, Backdrop CMS, and other products
CVE-2020-11023 jquery@1.9.1 medium 3.5.0 Potential XSS vulnerability in jQuery
CVE-2015-9251 jquery@1.9.1 medium 1.12.2 Cross-Site Scripting (XSS) in jquery

Permissions Breakdown

  • scripting medium Can inject scripts into pages; moderate risk, expected for ReaderMode.
  • tabs medium Access to tab URLs and metadata across all tabs.
  • activeTab low Scoped to user-activated tab; lower risk.
  • contextMenus low UI-only right-click menu; minimal risk.
  • webNavigation medium Can observe all navigation events; moderate privacy surface.
  • storage low Local storage for settings; low risk.
  • <all_urls> (host_permissions) high Broad host access on all URLs; content_scripts also match <all_urls>. Partially justified for ReaderMode.

Pillar Scores

Permissions4.50
Reputation5.00
Network2.00
Webstore3.50
Maintenance1.50
Privacy6.00
Code Quality4.50
CVE Exposure4.50

Bookkeeping

Rubric v3.6
Scored at 2026-06-16 07:52
Listing SHA f9d271ff8ab0…
Force block — not fired
Score recovered no
Elapsed 32.5s