Netskope Extension Risk

Detail view · rubric v3.6
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Prompt Security Browser Extension

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Risk Score
4.19
Risk Level: Medium
Recommendation: 🟡 MEDIUM RISK — review
Category Security
Installs 200,000
Rating 5.0
Last updated 2026-06-07
Manifest version MV3
CSP present ❌ no
Developer support@prompt.security
Verified publisher ✅ yes
Featured by Google ❌ no
Privacy policy link
Web Store open ↗

Top Risks

  • Privacy policy is SentinelOne's generic corporate notice: scope_extension=false with data_collection+third_party_sharing=true — scores maximum privacy risk.
  • <all_urls> host permission + content scripts on every site gives broad page-content access; justified for a GenAI DLP tool but high-impact if compromised.
  • No CSP (MV3 mitigates somewhat, but no explicit policy declared); 12 external AI/enterprise hosts contacted.
  • identity.email permission exposes signed-in user PII; no extension-scoped disclosure of how this is handled.
  • 200K installs amplify blast radius if extension is ever compromised or sold.

Evidence

  • privacy_policy_generic store Policy is SentinelOne corporate notice; scope_extension=false, data_collection=true, third_party_sharing=true → Privacy pillar maxed at 10.
  • verified_publisher store Verified publisher badge present; Reputation floor applied at 2.0.
  • host_permissions_all_urls manifest <all_urls> + content_scripts on http://* and https://* — full page access justified for DLP category.
  • external_hosts_12 crx 12 distinct AI/enterprise endpoints: OpenAI, Claude, Copilot, Gemini, Google Docs, M365, Outlook, Bing, etc.
  • no_csp manifest content_security_policy is null; MV3 provides some default isolation but no explicit hardening.
  • no_code_findings crx code_findings_raw empty, obfuscation_score=0.0, no CVEs — clean code surface.
  • maintenance_current store Last updated June 7, 2026 — 0 months stale; actively maintained.
  • no_bad_hosts api threat_intel bad_host_hits, affiliate_hits, monetization_hits all empty.

Permissions Breakdown

  • tabs medium Can read tab URLs and metadata across browser sessions.
  • storage low Local config/state persistence; limited standalone risk.
  • identity low OAuth token flow; scoped to extension auth needs.
  • identity.email medium Reads signed-in user email; PII exposure if exfiltrated.
  • alarms low Scheduled background tasks; low direct risk.
  • declarativeNetRequest medium Can block/modify network requests; powerful but non-reading.
  • downloads medium Can intercept or initiate file downloads.
  • <all_urls> (host) high Content scripts on every page; broadest possible reach.

Pillar Scores

Permissions5.50
Reputation2.00
Network5.50
Webstore2.50
Maintenance0.00
Privacy10.00
Code Quality0.00
CVE Exposure0.00

Bookkeeping

Rubric v3.6
Scored at 2026-06-15 14:19
Listing SHA d7614db4f42b…
Force block — not fired
Score recovered no
Elapsed 22.2s