Top Risks

• THREAT FEED: extension ID independently confirmed malicious by TPCI chrome-mal-ids — CoComelon Wallpaper Gameograf [adware] + malext.io malicious_extension_sentry (+2.5, capped).
• Privacy policy is Google's generic policy — not scoped to this extension, admits data collection and third-party sharing (Privacy +10).
• Uninstall and install URL hijacks redirect to gameograf.com UTM tracking links — monetization shell pattern.
• NewTab override with search permission is primary ad-monetization vector.
• No developer name listed; no CSP on MV3 extension with external JS host mlionltd.github.io.

Evidence

• install_url_hijack manifest onInstalled opens https://gameograf.com/?utm_source=install&utm_medium=link&utm_campaign=bg&utm_content=install
• uninstall_url_hijack manifest setUninstallURL to https://gameograf.com/?utm_source=uninstall&utm_medium=link&utm_campaign=bg&utm_content=uninstall
• newtab_override manifest chrome_url_overrides.newtab set to index.html; paired with search permission.
• privacy_policy_generic store Policy URL is Google's own privacy page; scope_extension=false, data_collection=true, third_party_sharing=true.
• external_host_github crx js_external_hosts includes mlionltd.github.io — third-party GitHub Pages host outside dev domain.
• dom_xss_sink crx innerHTML assigned from variable in js/popup.js with no CSP guard.
• no_developer_name store developer_name is empty string; reduces accountability.
• verified_publisher_stale store Verified publisher but months_since_update=16 triggers 0c cap; discount capped at -1.0.
• threat_feed_membership api Extension ID listed by TPCI chrome-mal-ids — CoComelon Wallpaper Gameograf [adware] + malext.io malicious_extension_sentry; score 5.36 -> 7.86 (+2.5 cap 2.5).

Permissions Breakdown

• search medium Allows manipulation of search providers; paired with newtab override raises monetization risk.
• host_permissions: https://api.gameograf.com/* low Scoped to developer's own API domain; limited blast radius.
• chrome_url_overrides.newtab medium Replaces new tab page — primary vector for ad-monetization and search hijacking.

Pillar Scores

Bookkeeping