Top Risks

• THREAT FEED: extension ID independently confirmed malicious by TPCI chrome-mal-ids — Cute Yellow Pompompurin Live Wallpaper [adware] + malext.io malicious_extension_sentry (+2.5, capped).
• NewTab override monetizes every new tab; install+uninstall URL hijack redirects to gameograf.com with UTM tracking.
• No CSP (csp_present=false) + innerHTML DOM-XSS sinks in popup.js and calendar.js elevate XSS risk.
• Developer name field empty; reputation opaque despite verified publisher badge.
• Extension contacts 12 JS external hosts including Google services and api.gameograf.com with no CSP constraint.

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
• no_csp manifest content_security_policy is null; MV3 default applies but no explicit hardening.
• dom_xss_sinks crx innerHTML from variable in js/popup.js and js/calendar.js with no CSP — elevated DOM-XSS risk.
• developer_name_empty store developer_name is empty string; identity accountability reduced.
• verified_publisher store Verified publisher badge present; partial reputation credit applied.
• privacy_policy_complete api Policy fetched; scope_extension=true, data_collection=true, retention=true, third_party_sharing=true — adequate.
• threat_feed_membership api Extension ID listed by TPCI chrome-mal-ids — Cute Yellow Pompompurin Live Wallpaper [adware] + malext.io malicious_extension_sentry; score 3.01 -> 5.51 (+2.5 cap 2.5).

Permissions Breakdown

• search medium Allows reading/overriding search provider; medium risk by itself but paired with newtab override raises concern.
• host_permissions: https://api.gameograf.com/* low Scoped to developer's own API domain; low blast radius.
• chrome_url_overrides.newtab medium Replaces every new tab; high reach, monetization vector for a themed wallpaper.

Pillar Scores

Bookkeeping