Top Risks

• THREAT FEED: extension ID independently confirmed malicious by TPCI chrome-mal-ids — Wuling Blossoms Arknights Endfield Live Wallpaper [adware] + malext.io malicious_extension_sentry (+2.5, capped).
• Privacy policy is Google's own policy — not scoped to this extension; admits data collection and 3rd-party sharing (+10 privacy).
• New-tab override replaces every new-tab page, uninstall/install URL hijacks to gameograf.com tracking URLs.
• No developer name listed; verified publisher badge present but privacy policy is a generic Google URL.
• Two innerHTML DOM-XSS sinks in popup.js and calendar.js with no CSP to mitigate them.

Evidence

• newtab_override manifest chrome_url_overrides.newtab = newtab.html; replaces every new tab for all users.
• privacy_policy_generic store Policy URL is myaccount.google.com/privacypolicy — Google's own policy, not scoped to this extension.
• uninstall_url_hijack crx setUninstallURL targets https://gameograf.com/?utm_source=extension&utm_medium=install.
• install_url_hijack crx onInstalled opens https://gameograf.com/?utm_source=extension&utm_medium=install.
• dom_xss_sink crx innerHTML assigned from variable in popup.js and calendar.js; no CSP to block XSS exploitation.
• no_developer_name store developer_name is empty string despite verified_publisher == true.
• verified_publisher store verified_publisher == true; gameograf.com resolves and is not throwaway.
• no_csp manifest content_security_policy is null; MV3 default applies but no explicit extension-page CSP declared.
• threat_feed_membership api Extension ID listed by TPCI chrome-mal-ids — Wuling Blossoms Arknights Endfield Live Wallpaper [adware] + malext.io malicious_extension_sentry; score 5.18 -> 7.68 (+2.5 cap 2.5).

Permissions Breakdown

• search medium Allows reading/modifying search queries; elevated in context of NewTab override.
• host_permissions: https://api.gameograf.com/* medium Scoped to dev API; low surface but enables data exfil to dev backend.
• chrome_url_overrides.newtab medium Replaces every new tab; high REACH, monetization/redirect vector.

Pillar Scores

Bookkeeping