Top Risks

• THREAT FEED: extension ID independently confirmed malicious by TPCI chrome-mal-ids — Retro Pixel Clouds and Mountains Live Wallpaper [adware] + malext.io malicious_extension_sentry (+2.5, capped).
• NewTab override with uninstall/install URL hijack to gameograf.com — classic monetization shell pattern.
• Uninstall and install URL hijack both redirect to developer's site with UTM tracking.
• No CSP declared (MV3 but csp_present==false); DOM innerHTML sinks in popup.js and calendar.js increase XSS risk.
• No developer name listed; verified publisher badge but empty 'Offered by' field is a governance gap.

Evidence

• newtab_override manifest chrome_url_overrides.newtab set to newtab.html — replaces new-tab page on every new tab open.
• uninstall_url_hijack crx setUninstallURL target: 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_sink_innerhtml_userctrl crx innerHTML from variable in js/popup.js and js/calendar.js; no CSP to mitigate DOM-XSS.
• broad_js_external_hosts crx 12 external JS hosts including chat.openai.com, all Google Workspace apps — scope mismatch for wallpaper.
• no_developer_name store developer_name is empty; verified publisher but no 'Offered by' display name.
• verified_publisher store Verified publisher badge present; domain resolves, not throwaway — partial trust signal.
• privacy_policy_adequate api Policy fetched; scope_extension=true, data_collection=true, retention=true, third_party_sharing=true — fully disclosed.
• threat_feed_membership api Extension ID listed by TPCI chrome-mal-ids — Retro Pixel Clouds and Mountains Live Wallpaper [adware] + malext.io malicious_extension_sentry; score 2.79 -> 5.29 (+2.5 cap 2.5).

Permissions Breakdown

• search medium Search API allows reading and potentially overriding search queries.
• chrome_url_overrides.newtab medium Replaces new-tab page; high-visibility override enabling search monetization.
• host_permissions: https://api.gameograf.com/* low Scoped to developer's own API domain; limited blast radius.

Pillar Scores

Bookkeeping