Shinobu Kochō Wallpaper
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Risk Score
5.52
Risk Level:
Medium
Recommendation:
🟡 MEDIUM RISK — review
Top Risks
- NewTab override + uninstall/install URL hijack to owhit.com: classic ad-monetization shell pattern.
- Privacy policy is Google's generic policy — does not scope to this extension at all (+10.0 privacy pillar).
- Free-webmail developer (gmail) with no verified business; no verified publisher badge.
- Contacts 7 external JS hosts (chatgpt.com, instagram.com, x.com, youtube.com, owhit.com, etc.) with no CSP.
- search permission + NewTab override enables full search-monetization pipeline without broad host permissions.
Evidence
- uninstall_url_hijack manifest chrome.runtime.setUninstallURL → https://owhit.com/uninstall (3rd-party redirect on uninstall).
- install_url_hijack manifest onInstalled opens https://owhit.com/shinobu-kocho-wallpaper (3rd-party page on install).
- newtab_override manifest chrome_url_overrides.newtab = index.html; every new tab served by extension.
- generic_privacy_policy store Policy URL is myaccount.google.com/privacypolicy — Google's own policy, not scoped to this extension.
- free_webmail_developer store Developer email bulenttuncer250@gmail.com; no verified publisher; no business domain.
- external_js_hosts crx 7 external hosts referenced: owhit.com, chatgpt.com, instagram.com, x.com, youtube.com, google.com, chrome.google.com.
- no_csp manifest content_security_policy is null; MV3 default applies but no explicit CSP tightening.
- search_permission_newtab manifest search permission combined with NewTab override enables search-monetization without host permissions.
Permissions Breakdown
- search medium Allows reading search queries; combined with NewTab override amplifies search monetization risk.
- chrome_url_overrides.newtab high Replaces every new tab with extension page; primary vector for ad/search monetization.
Pillar Scores
Permissions4.00
Reputation7.50
Network2.00
Webstore9.00
Maintenance0.00
Privacy10.00
Code Quality0.00
CVE Exposure0.00
Bookkeeping
Rubric v3.6
Scored at 2026-08-31 16:38
Listing SHA
f1d768d3de20…
Force block
— not fired
Score recovered
no
Elapsed
—