Top Risks

• THREAT FEED: extension ID independently confirmed malicious by TPCI chrome-mal-ids — Jazzy Cat Live Wallpaper New Tab [adware] + malext.io malicious_extension_sentry (+2.5, capped).
• NewTab override replaces every new tab with developer-controlled content; persistent high-reach surface.
• Uninstall and install URL hijacking redirect to developer tracking URLs on both events.
• No CSP present on MV3 extension; DOM-XSS sinks (innerHTML) in popup.js and calendar.js are unmitigated.
• No developer name listed despite verified publisher status; identity accountability gap.

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 gameograf.com with utm tracking params on uninstall.
• install_url_hijack crx onInstalled opens gameograf.com with utm tracking params on install.
• no_csp manifest content_security_policy is null; csp_present=false on MV3 extension with innerHTML sinks.
• dom_xss_sink crx innerHTML used with variable input in popup.js and calendar.js; no CSP to mitigate.
• verified_publisher store Verified publisher badge present; domain resolves, not throwaway.
• privacy_policy_third_party_sharing api Policy fetched, scoped, discloses data collection and third-party sharing with retention.
• no_developer_name store developer_name is empty string despite verified publisher status.
• threat_feed_membership api Extension ID listed by TPCI chrome-mal-ids — Jazzy Cat Live Wallpaper New Tab [adware] + malext.io malicious_extension_sentry; score 3.31 -> 5.81 (+2.5 cap 2.5).

Permissions Breakdown

• search medium Allows querying browser search; medium risk paired with NewTab override.
• 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 page; high reach, monetization surface.

Pillar Scores

Bookkeeping