Top Risks

• THREAT FEED: extension ID independently confirmed malicious by TPCI chrome-mal-ids — Nayeon Twice K-pop Wallpapers New Tab by Gameograf [adware] + malext.io malicious_extension_sentry (+2.5, capped).
• Privacy policy is Google's generic policy — does not scope to this extension; admits data collection and 3rd-party sharing (max privacy score).
• New-tab override with uninstall URL hijack and install URL hijack: classic monetization shell pattern.
• Nine medium-severity CVEs across three bundled jQuery/jQuery-UI versions, all below fixed versions.
• No CSP (csp_present=false) on MV3 extension with CVE-affected DOM-manipulation libs increases XSS exploitability.

Evidence

• uninstall_url_hijack + install_url_hijack crx Extension sets uninstall URL to gameograf.com/nayeon-twice-k-pop-wallpapers-new-tab/ and opens index.html on install — monetization shell indicators.
• generic_privacy_policy store Privacy URL is Google's own account policy; fetched, scope_extension=false, data_collection=true, third_party_sharing=true → D clause applies, score 10.
• newtab_override manifest chrome_url_overrides.newtab = index.html; high-visibility page replacement on every new tab.
• cve_bundled_libs crx 9 moderate CVEs across jquery@1.9.1, jquery@3.4.1, jquery-ui@1.12.1; none patched to fixed_in versions.
• no_csp manifest csp_present=false on MV3 extension with CVE-affected jQuery libs; raises XSS exploitability.
• stale_extension store 16 months since last update; vulnerable libraries still bundled.
• no_developer_name store developer_name is empty string; reduces accountability.
• 12_external_js_hosts crx js_external_hosts lists 12 domains (whatsapp, pinterest, crazycraftz, twitter, etc.) broadening network attack surface.
• threat_feed_membership api Extension ID listed by TPCI chrome-mal-ids — Nayeon Twice K-pop Wallpapers New Tab by Gameograf [adware] + malext.io malicious_extension_sentry; score 5.97 -> 8.47 (+2.5 cap 2.5).

CVE Exposures (9)

Permissions Breakdown

• topSites medium Reads user's most visited sites; NewTab extension common but exposes browsing habits.
• unlimitedStorage low Allows unbounded local storage; low direct risk but enables large local caching.
• storage low Standard key-value storage; low risk on its own.
• chrome_url_overrides.newtab medium Replaces new-tab page; high-visibility hijack surface, monetization vector.

Pillar Scores

Bookkeeping