CaveiraCards
amdebhmimbbigkdagackjdnmjnogdhic
Risk Score
3.34
Risk Level:
Low
Recommendation:
🟢 LOW RISK — review
Top Risks
- Privacy policy is Google's generic policy — does not describe this extension's data practices at all.
- Developer name, email, install count, and last-updated date are all missing — very low accountability.
- install_url_hijack detected: extension opens a URL on install (target unknown).
- Two DOM-XSS innerHTML sinks found; no CSP in MV3 manifest to mitigate.
- nubank.com.br appears in js_external_hosts but is not in host_permissions — unexplained external contact.
Evidence
- privacy_policy_generic store Policy URL is Google Account generic policy; scope_extension=false, data_collection=true, third_party_sharing=true.
- developer_identity_missing store developer_name, developer_email all empty; verified_publisher=false, is_featured=false.
- install_url_hijack crx install_url_hijack=true; target unknown. Extension opens a URL on install.
- dom_xss_sinks crx innerHTML sinks in shared/anki.js and sessoes.js; csp_present=false elevates risk.
- unexpected_external_host crx nubank.com.br in js_external_hosts but absent from host_permissions; purpose not stated.
- maintenance_unknown store months_since_update=null; last_updated missing; cannot assess staleness.
- localhost_host_permission manifest http://localhost:8765/* permitted — consistent with AnkiConnect but unusual for enterprise.
- no_cve_findings crx cve_findings_raw empty; no known vulnerable libraries detected.
Permissions Breakdown
- storage low Stores local extension data; low risk.
- tabs medium Can read tab URLs and metadata; moderate privacy surface.
- notifications low Displays notifications; low risk.
- alarms low Schedules periodic tasks; low risk.
- offscreen low Creates offscreen documents; low risk in MV3 context.
- host:tecconcursos.com.br low Narrow host permission matching stated function (Brazilian exam platform).
- host:grancursosonline.com.br low Narrow host permission matching stated function.
- host:qconcursos.com low Narrow host permission matching stated function.
- host:deltinha.com.br low Narrow host permission matching stated function.
- host:app.caveira.com low Developer's own platform; narrow scope.
- host:lms.focusconcursos.com.br low Narrow host permission matching stated function.
- host:localhost:8765 medium Localhost access suggests AnkiConnect integration; unusual but documented use-case.
Pillar Scores
Permissions2.30
Reputation6.50
Network0.00
Webstore2.00
Maintenance0.00
Privacy10.00
Code Quality2.00
CVE Exposure0.00
Bookkeeping
Rubric v3.6
Scored at 2026-08-31 11:38
Listing SHA
1565c5ee6334…
Force block
— not fired
Score recovered
no
Elapsed
—