What’s Vulnerable › Vulnerabilities

CVE-2023-39967: Full read and controlled SSRF through URL parameter when testing a request inside wiremock-studio

• Severity: critical (CVSS 10.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-09-06 · updated 2026-06-17
• Weakness: CWE-918

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. The vendor has discontinued the affected Wiremock studio product and there will be no fix. Users are advised to find alternatives.

Affected products

• wiremock Studio: through 2.32.0-17

References

• https://github.com/wiremock/wiremock/security/advisories/GHSA-676j-xrv3-73vc
• https://github.com/wiremock/wiremock/security/advisories/GHSA-676j-xrv3-73vc

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