CVE-2023-39967

Name of the Vulnerable Software and Affected Versions WireMock Studio (affected versions not specified)

Description WireMock is a tool for mocking HTTP services. When certain request URLs like "@127.0.0.1:1234" are used in WireMock Studio configuration fields, the request might be forwarded to an arbitrary service reachable from WireMock's instance. There are 3 identified potential attack vectors: via "TestRequester" functionality, webhooks, and the proxy mode. As we can control HTTP Method, HTTP Headers, HTTP Data, it allows sending requests with the default level of credentials for the WireMock instance.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability. The vendor has discontinued the affected WireMock Studio product and there will be no fix. Users are advised to find alternatives. As a temporary workaround, consider disabling the "TestRequester" functionality, webhooks, and the proxy mode to minimize the risk of exploitation. Restrict access to the WireMock Studio configuration fields to prevent unauthorized changes. Avoid using request URLs that could be forwarded to arbitrary services until an alternative solution is implemented.