Top Risks

• THREAT FEED: extension ID independently confirmed malicious by TPCI chrome-mal-ids — MSLocações WhatsApp Plugin [data-theft] + malext.io malicious_extension_sentry (+2.5, capped).
• Privacy policy is Google's generic account policy — not scoped to this extension and admits data collection + 3rd-party sharing.
• Brand impersonation: uses WhatsApp brand name; developer is not a confirmed Meta/WhatsApp entity.
• No CSP declared (MV3 mitigates somewhat but increases code-injection risk if vulns arise).
• 3 external JS hosts including exemplo.com (example domain) and developer domain — warrants review.

Evidence

• privacy_policy_generic store PP URL is myaccount.google.com/privacypolicy — Google's own policy, not scoped to MSLocações extension.
• brand_impersonation store brand_mention.is_impersonation=true for WhatsApp; developer domain is msystemsprojetos.com.br, not Meta.
• no_csp manifest content_security_policy is null; MV3 provides defaults but no explicit hardening declared.
• js_external_hosts crx Extension contacts exemplo.com, msystemsprojetos.com.br, web.whatsapp.com — exemplo.com is suspicious.
• not_verified_publisher store verified_publisher=false, is_featured_by_google=false; no trust signals from Chrome Web Store.
• narrow_scope manifest Permissions limited to scripting+activeTab; host scoped to web.whatsapp.com only. Low capability surface.
• clean_code_scan crx code_findings_raw empty, obfuscation_score=0.0, no CVEs detected.
• small_install_base store Only 209 installs; limited community exposure and vetting.
• threat_feed_membership api Extension ID listed by TPCI chrome-mal-ids — MSLocações WhatsApp Plugin [data-theft] + malext.io malicious_extension_sentry; score 3.03 -> 5.53 (+2.5 cap 2.5).

Permissions Breakdown

• scripting medium Can inject JS into whatsapp.com pages; scoped to single host.
• activeTab low Temporary access to active tab only; low standalone risk.
• https://web.whatsapp.com/* medium Host permission scoped to WhatsApp Web; matches stated function.

Pillar Scores

Bookkeeping