{"id":"CVE-2023-41327","aliases":["BIT-wiremock-2023-41327","GHSA-hq8w-9w8w-pmx7"],"url":"https://o3.security/vulnerability/CVE-2023-41327","summary":"Controlled SSRF through URL in the WireMock","details":"WireMock is a tool for mocking HTTP services. WireMock can be configured to only permit proxying (and therefore recording) to certain addresses. This is achieved via a list of allowed address rules and a list of denied address rules, where the allowed list is evaluated first. \n\nUntil WireMock Webhooks Extension 3.0.0-beta-15, the filtering of target addresses from the proxy mode DID NOT work for Webhooks, so the users were potentially vulnerable regardless of the `limitProxyTargets` settings. Via the WireMock webhooks configuration, POST requests from a webhook might be forwarded to an arbitrary service reachable from WireMock’s instance. For example, If someone is running the WireMock docker Container inside a private cluster, they can trigger internal POST requests against unsecured APIs or even against secure ones by passing a token, discovered using another exploit, via authentication headers. This issue has been addressed in versions 2.35.1 and 3.0.3 of wiremock. Wiremock studio has been discontinued and will not see a fix. Users unable to upgrade should use external firewall rules to define the list of permitted destinations.","published":"2023-09-06T20:38:45.161Z","modified":"2026-07-15T01:49:02.028592814Z","cvss":{"score":4.6,"severity":"MEDIUM","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.wiremock:wiremock-webhooks-extension","fixedVersion":"3.0.3"},{"ecosystem":"Maven","name":"org.wiremock:wiremock-webhooks-extension","fixedVersion":"2.35.1"}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/wiremock/wiremock/releases/tag/3.0.0-beta-15"},{"type":"WEB","url":"https://wiremock.org/docs/configuration/#preventing-proxying-to-and-recording-from-specific-target-addresses"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/41xxx/CVE-2023-41327.json"},{"type":"ADVISORY","url":"https://github.com/wiremock/wiremock/security/advisories/GHSA-hq8w-9w8w-pmx7"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-41327"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T01:49:02.028592814Z"}}