SlimSender
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Risk Score
4.88
Risk Level:
Medium
Recommendation:
🟡 MEDIUM RISK — review
Top Risks
- new Function() in inject.js executes arbitrary string commands inside WhatsApp Web context — remote code execution vector.
- Privacy policy is Google's generic policy (not scoped to this extension) yet admits data collection and third-party sharing — effectively no real policy.
- WhatsApp brand impersonation: extension is not affiliated with Meta/WhatsApp and confirmed_owner=false.
- Install URL hijack opens web.whatsapp.com on install — mild but signals low-quality dev practices.
- growsoft.io appears in js_external_hosts but not in declared host_permissions — undisclosed third-party contact.
Evidence
- function_constructor_rce crx inject.js uses new Function() to eval arbitrary command string inside WhatsApp Web content script.
- generic_google_privacy_policy store Privacy policy URL is myaccount.google.com/privacypolicy — Google's own policy, not scoped to SlimSender.
- brand_impersonation store Brand 'whatsapp' mentioned; confirmed_owner=false, not verified publisher.
- install_url_hijack manifest install_url_hijack=true; onInstalled opens https://web.whatsapp.com/.
- undisclosed_external_host crx growsoft.io in js_external_hosts but absent from host_permissions — undisclosed third-party endpoint.
- no_csp manifest content_security_policy is null (csp_present=false); no inline script restrictions on MV3 extension pages.
- reputation_unverified store Not verified publisher, not featured, developer name 'ferramentasmarketing', 54 installs, 0 ratings.
- privacy_policy_data_collection_third_party api Policy fetched: scope_extension=false, data_collection=true, third_party_sharing=true — worst-case generic policy.
Permissions Breakdown
- activeTab low Grants access only to the active tab on user action; low blast radius.
- storage low Local extension storage for settings; no cross-origin data risk.
- https://web.whatsapp.com/* medium Content script runs on WhatsApp Web; can read/modify all messages and contacts.
- https://controle.dablioweb.com/* medium Outbound access to developer-controlled backend; data exfil path.
- https://api.ipify.org/* low Public IP lookup service; low risk but reveals user IP to third party.
Pillar Scores
Permissions2.00
Reputation7.00
Network2.00
Webstore4.50
Maintenance3.50
Privacy10.00
Code Quality5.00
CVE Exposure0.00
Bookkeeping
Rubric v3.6
Scored at 2026-08-31 04:51
Listing SHA
1231e90cb826…
Force block
— not fired
Score recovered
no
Elapsed
—