Hypothesis - Web & PDF Annotation
bjfhmglciegochdpefhhlphglcehbmek
Risk Score
3.85
Risk Level:
Low
Recommendation:
🟢 LOW RISK — review
Top Risks
- Privacy policy fetched but scope_extension=false with data_collection=true and third_party_sharing=true — policy admits broad sharing without scoping to this extension.
- <all_urls> host_permission paired with scripting enables JS injection on every site visited.
- No CSP (MV3 default enforced, but absence amplifies code-quality risks from bundled pdfjs Function constructor).
- Privacy policy does not scope data collection to this extension; third-party sharing admitted.
- 12 external JS hosts including hyp.is and hypothes.is annotation servers — annotation content transits external infrastructure.
Evidence
- host_permissions=<all_urls>+scripting manifest Annotation tool requires broad access; justified by category but still high capability surface.
- privacy_policy_scope_extension=false,third_party_sharing=true crx Policy at hypothes.is/privacy fetched; data_collection+third_party_sharing true but not scoped to extension — triggers +10.0 privacy.
- function_constructor in pdfjs crx new Function() in pdfjs/build/pdf.js and pdf.worker.js — standard PDF.js eval-support probe, low exploitation risk.
- no_csp manifest content_security_policy is null; MV3 strict default applies so no network-fetch-eval path, but still noted.
- is_featured_by_google=true store Google-featured badge reduces reputation risk; not verified publisher.
- install_url_hijack+uninstall_url_hijack=true,target=null crx Both install and uninstall URL hooks set but targets are null — no active hijack destination detected.
- no_bad_hosts,no_affiliate,no_monetization api threat_intel shows zero bad-host, affiliate, or monetization hits — clean threat-intel profile.
- cve_findings_raw=empty crx No CVEs found in bundled libraries; CVE pillar = 0.0.
Permissions Breakdown
- scripting medium Can inject JS into pages; paired with <all_urls> host permission, covers all sites.
- storage low Local extension storage only; standard for annotation tools.
- tabs medium Access to tab URLs and metadata; needed for annotation context.
- <all_urls> (host_permission) high Grants content-script injection and network access on every site the user visits.
Pillar Scores
Permissions4.50
Reputation3.50
Network3.50
Webstore3.00
Maintenance0.00
Privacy10.00
Code Quality2.50
CVE Exposure0.00
Bookkeeping
Rubric v3.6
Scored at 2026-06-16 05:55
Listing SHA
f2c5c32b317d…
Force block
— not fired
Score recovered
no
Elapsed
25.9s