CVE-2023-39967Public exploit

Internal service access via authority-confused request URLs

Published Sep 6, 2023 · Updated Sep 26, 2024

SSRF in WireMock Studio 2.32.0-17 and earlier allows remote attackers to access server-reachable services through crafted request URLs. Test Requester, webhook, and proxy URL handling appends input directly after http://localhost:8000, allowing an @ character to replace the URI authority. An exposed Studio interface is sufficient; controlled methods, headers, and bodies can reach internal APIs, while Test Requester and proxy mode return their responses.

CVSS severity8.8
High
EPSS probability1.05%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in WireMock Studio 2.32.0-17 and earlier allows remote attackers to access server-reachable services through crafted request URLs. Test Requester, webhook, and proxy URL handling appends input directly after http://localhost:8000, allowing an @ character to replace the URI authority. An exposed Studio interface is sufficient; controlled methods, headers, and bodies can reach internal APIs, while Test Requester and proxy mode return their responses.

The record

CVE
CVE-2023-39967
Published
Sep 6, 2023
Updated
Sep 26, 2024
Vendor
WireMock
Product
WireMock
Classifications
CWE-918, T1090, T1190
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 6, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 26, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <*
  2. Affected versionversion=All versions

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

WireMock · WireMockversion=0 <*; version=All versions

Published CVSS scores

8.8GitHubCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1090Proxy
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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