Incorrect Cross-Origin Resource Sharing (CORS) configuration in Hiberus Sintra. Cross-Origin Resource Sharing (CORS) allows browsers to make cross-domain requests in a controlled manner. This request has an “Origin” header that identifies the domain making the initial request and defines the protocol between a browser and a server to see if the request is allowed. An attacker can exploit this and potentially perform privileged actions and access confidential information when Access-Control-Allow-Credentials is enabled.
The product uses a web-client protection mechanism such as a Content Security Policy (CSP) or cross-domain policy file, but the policy includes untrusted domains with which the web client is allowed to communicate.
If a cross-domain policy file includes domains that should not be trusted, such as when using wildcards under a high-level domain, then the application could be attacked by these untrusted domains. In many cases, the attack can be launched without the victim even being aware of it.