revenuecat entitlement’s vulnerability

Intro

This vulnerable can be used on all app uses revenuecat subscriptions verification.  All code here wrote on JavaScript

Entitlement’s bug

This vulnerable based on getting entitlement’s s from server, example

const params = {

url: "https://api.revenuecat.com/v1/product_entitlement_mapping",

timeout: 5000,

headers: $request.headers

}

delete params["headers"]["x-revenuecat-etag"]

$httpClient.get(params, function(errormsg, response, data) {

if(errormsg) {

err(errormsg)

}

else{

mapping(data)

}

})

SSL pinning

SSL pinning is mechanism to stop sending response if traffic was capturing .

Recommendation: add SSL pinning to all app requests