Top Risks

• THREAT FEED: extension ID independently confirmed malicious by TPCI chrome-mal-ids — My Melody Bright Flower Shop 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 active (+3.0+2.0 webstore) driving score up.
• No CSP (csp_present=false) with innerHTML DOM-XSS sinks in popup.js and calendar.js.
• 55 installs but newtab+search override combo creates high per-user impact surface.

Evidence

• uninstall_url_hijack manifest setUninstallURL → https://gameograf.com/?utm_source=extension&utm_medium=install (+3.0 webstore)
• install_url_hijack manifest onInstalled opens https://gameograf.com/?utm_source=extension&utm_medium=install (+2.0 webstore)
• newtab_override manifest chrome_url_overrides.newtab = newtab.html; replaces new-tab page entirely (+2.0 permissions/webstore)
• no_csp manifest content_security_policy is null; DOM-XSS sinks present in popup.js and calendar.js without CSP guard.
• dom_sink_innerhtml_userctrl crx Two innerHTML sinks in popup.js and calendar.js; no CSP → elevated DOM-XSS risk (+2.0 code quality).
• search_permission manifest search permission declared alongside newtab override; monetization search-redirect surface.
• no_verified_publisher store verified_publisher=false, is_featured_by_google=false; small operator with 55 installs.
• privacy_policy_scope 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 — My Melody Bright Flower Shop Live Wallpaper [adware] + malext.io malicious_extension_sentry; score 2.95 -> 5.45 (+2.5 cap 2.5).

Permissions Breakdown

• search medium Allows reading/overriding search provider; paired with newtab override amplifies monetization risk.
• host_permissions: https://api.gameograf.com/* low Scoped to dev-controlled domain; used for wallpaper/calendar API calls.
• chrome_url_overrides.newtab medium Replaces new-tab page — high visibility surface for monetization and data collection.

Pillar Scores

Bookkeeping