Top Risks

• THREAT FEED: extension ID independently confirmed malicious by TPCI chrome-mal-ids — Muscle Car Tire Burnout Live Wallpaper [adware] + malext.io malicious_extension_sentry (+2.5, capped).
• NewTab override + uninstall/install URL hijack: classic traffic-monetization shell pattern.
• Two DOM-XSS innerHTML sinks with no CSP; elevated XSS risk from API-supplied content.
• No developer name listed; verified publisher badge but empty 'Offered by' field.
• Extension contacts 12 external JS hosts beyond its own API domain (Google properties + ssl.gstatic.com).

Evidence

• newtab_override manifest chrome_url_overrides.newtab set to newtab.html — replaces every new tab for all users.
• uninstall_url_hijack crx setUninstallURL → https://gameograf.com/?utm_source=extension&utm_medium=install (3rd party).
• install_url_hijack crx onInstalled opens https://gameograf.com/?utm_source=extension&utm_medium=install.
• no_csp manifest content_security_policy is null; no CSP protection for MV3 extension pages.
• dom_xss_sink crx innerHTML assigned from variable in popup.js and calendar.js with no CSP — DOM-XSS risk.
• verified_publisher store Verified publisher badge present but developer_name is empty string.
• privacy_policy_adequate api Policy fetched; scope_extension=true, data_collection=true, retention=true, third_party_sharing=true.
• js_external_hosts crx 12 external hosts in JS including Google suite properties and ssl.gstatic.com beyond own API.
• threat_feed_membership api Extension ID listed by TPCI chrome-mal-ids — Muscle Car Tire Burnout Live Wallpaper [adware] + malext.io malicious_extension_sentry; score 4.08 -> 6.58 (+2.5 cap 2.5).

Permissions Breakdown

• search medium Allows reading/modifying search queries; medium risk in a NewTab override context.
• host_permissions: https://api.gameograf.com/* low Scoped to developer's own API domain; limited blast radius.
• chrome_url_overrides.newtab medium Replaces every new tab; high reach, monetization vector, search diversion risk.

Pillar Scores

Bookkeeping