Top Risks

• THREAT FEED: extension ID independently confirmed malicious by TPCI chrome-mal-ids — Jake the Dog Vibe Adventure Time Live Wallpaper [adware] + malext.io malicious_extension_sentry (+2.5, capped).
• NewTab override replaces every new tab with developer-controlled content; high-reach monetization surface.
• Uninstall URL hijack redirects to gameograf.com with tracking params on removal.
• Install URL hijack opens gameograf.com with UTM tracking on installation.
• Two innerHTML DOM-XSS sinks with no CSP — if API data is attacker-influenced, XSS is possible.

Evidence

• newtab_override manifest chrome_url_overrides.newtab = newtab.html — replaces every new tab for all users.
• uninstall_url_hijack crx setUninstallURL to https://gameograf.com/?utm_source=extension&utm_medium=install — 3rd-party redirect.
• install_url_hijack crx onInstalled opens https://gameograf.com/?utm_source=lofi&utm_medium=install.
• dom_xss_sink crx innerHTML assigned from variable in popup.js and calendar.js; no CSP to mitigate.
• no_csp manifest content_security_policy is null; MV3 default applies but no explicit hardening.
• verified_publisher store gameograf.com verified; domain resolves, not throwaway, no bad-host hits.
• privacy_policy_scoped api Policy fetched; scope_extension=true, data_collection=true, retention=true, third_party_sharing=true.
• no_developer_name store developer_name is empty string; reduces accountability signal.
• threat_feed_membership api Extension ID listed by TPCI chrome-mal-ids — Jake the Dog Vibe Adventure Time Live Wallpaper [adware] + malext.io malicious_extension_sentry; score 4.15 -> 6.65 (+2.5 cap 2.5).

Permissions Breakdown

• search medium Can observe or influence search queries; medium risk on its own.
• host_permissions: https://api.gameograf.com/* low Scoped to developer's own API domain; acceptable for a wallpaper/newtab extension.
• chrome_url_overrides.newtab medium Replaces every new tab; high-reach real estate for monetization or search hijacking.

Pillar Scores

Bookkeeping