Is Number Checker for WhatsApp – Validate, Search & Lookup safe?
Number Checker for WhatsApp sends typed WhatsApp message URLs to third-party link preview services.
When WhatsApp generates a link preview, the extension's injected helper wraps that preview function and reads the URL being previewed. It sends the URL to configured preview services so they can fetch preview data and thumbnails outside WhatsApp's normal flow.
AI-generated. Findings may contain errors. Those marked Verified have been manually reviewed.
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Findings
WhatsApp message URLs sent to third-party preview services
When you type or paste a URL into WhatsApp, the extension's injected helper rewrites link-preview handling and sends the URL to third-party endpoints: cobrancas.uppermesh.com.br, wajsapi.titanchat.com.br, wppc-linkpreview.cloudtrix.com.br.
- Severity
- Medium unwanted
- Type
- Unexpected
- CWE
- CWE-359
- Source
- Dynamic sandbox
A user action in WhatsApp triggers link preview generation for a typed or pasted URL.
The extension's injected WhatsApp helper rewrites preview generation and sends the URL to third-party preview services.
- Your message URLhttps://example.com/article
The URL you typed or pasted in WhatsApp is sent to a third-party preview service so it can fetch preview data.
Dynamic analysis confirmed that the extension registers the WhatsApp helper in the page context and that the helper wraps WhatsApp's link preview function before requesting the third-party preview endpoints.
Where it sends data
Destinations our analysis observed Number Checker for WhatsApp – Validate, Search & Lookup contacting. Sending data somewhere is not a finding on its own - an extension that syncs your settings has to talk to its own server - but it is where your data can go, and who else it goes to.
- wajsapi.titanchat.com.br
Number Checker for WhatsApp – Validate, Search & Lookup sends data to wajsapi.titanchat.com.br. 12 other extensions we have analysed send data here.
- wppc-linkpreview.cloudtrix.com.br
Number Checker for WhatsApp – Validate, Search & Lookup sends data to wppc-linkpreview.cloudtrix.com.br. 12 other extensions we have analysed send data here.
- cobrancas.uppermesh.com.br
Number Checker for WhatsApp – Validate, Search & Lookup sends data to cobrancas.uppermesh.com.br. 8 other extensions we have analysed send data here.