Top Risks

• THREAT FEED: extension ID independently confirmed malicious by TPCI chrome-mal-ids — Smoke Sheet 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 and install URL hijack redirect to gameograf.com tracking URL on both events.
• Two innerHTML DOM-XSS sinks in popup.js and calendar.js with no CSP to mitigate.
• No CSP declared (MV3 default strict but null csp field) combined with innerHTML sinks.

Evidence

• newtab_override manifest chrome_url_overrides.newtab set to newtab.html — replaces every new tab for all users.
• 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 js/popup.js and js/calendar.js — XSS risk without CSP.
• no_csp manifest content_security_policy is null; csp_present false — no explicit CSP hardening.
• verified_publisher store Developer support@gameograf.com is a verified publisher; domain resolves and is not throwaway.
• privacy_policy api Policy fetched, scoped to extension, discloses data collection, retention, and third-party sharing.
• search_permission_plus_newtab manifest search permission + newtab override is a common search-monetization pattern.
• threat_feed_membership api Extension ID listed by TPCI chrome-mal-ids — Smoke Sheet Live Wallpaper [adware] + malext.io malicious_extension_sentry; score 3.23 -> 5.73 (+2.5 cap 2.5).

Permissions Breakdown

• search medium Allows querying browser search; combined with newtab override raises monetization concern.
• host_permissions: https://api.gameograf.com/* low Scoped to developer's own API domain only.
• chrome_url_overrides.newtab medium Replaces every new tab page — high reach, monetization surface.

Pillar Scores

Bookkeeping