Top Risks

• THREAT FEED: extension ID independently confirmed malicious by TPCI chrome-mal-ids — Halloween Black Cat Live Wallpaper [adware] + malext.io malicious_extension_sentry (+2.5, capped).
• NewTab override with uninstall/install URL hijack — classic monetization shell pattern.
• No CSP declared (MV3); two innerHTML DOM-XSS sinks with no CSP mitigation.
• Developer name absent; verified publisher but no named entity on listing.
• Months since update = 12 — approaching stale threshold; no changelog visible.

Evidence

• newtab_override manifest chrome_url_overrides.newtab set to newtab.html — replaces new-tab page.
• uninstall_url_hijack crx setUninstallURL → https://gameograf.com/?utm_source=gameograf&utm_medium=link&utm_campaign=bg&utm_content=uninstall
• install_url_hijack crx onInstalled opens https://gameograf.com/?utm_source=install&utm_medium=link&utm_campaign=bg&utm_content=install
• no_csp manifest content_security_policy is null; csp_present == false on MV3 extension.
• dom_xss_sink crx Two innerHTML sinks in popup.js and calendar.js with no CSP — DOM-XSS risk elevated.
• verified_publisher store gameograf.com verified, resolves, not throwaway — mitigates reputation somewhat.
• privacy_policy api Policy scoped, discloses data collection, retention, third-party sharing — adequate.
• maintenance store 12 months since update — 6–12 mo band, +3.5 maintenance score.
• threat_feed_membership api Extension ID listed by TPCI chrome-mal-ids — Halloween Black Cat Live Wallpaper [adware] + malext.io malicious_extension_sentry; score 4.36 -> 6.86 (+2.5 cap 2.5).

Permissions Breakdown

• search medium Allows overriding search provider; monetization risk in NewTab context.
• host_permissions: https://api.gameograf.com/* low Scoped to developer's own API domain; low blast radius.
• chrome_url_overrides.newtab medium NewTab override replaces browser new-tab page; high monetization/tracking surface.

Pillar Scores

Bookkeeping