CVE-2023-41327

SSRF via unfiltered webhook target URLs

Published Sep 6, 2023 · Updated Sep 26, 2024

SSRF in WireMock Webhooks Extension 2.x before 2.35.1 and 3.x before 3.0.3 allows remote attackers to send POST requests to reachable services. The webhook request path bypasses NetworkAddressRules configured through limitProxyTargets and sends the target URL through WireMock's HTTP client. A webhook must be configured and triggered by attacker-influenced input; impact is limited to outbound POST effects on services reachable from the server.

CVSS severity4.6
Medium
EPSS probability0.50%
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 Webhooks Extension 2.x before 2.35.1 and 3.x before 3.0.3 allows remote attackers to send POST requests to reachable services. The webhook request path bypasses NetworkAddressRules configured through limitProxyTargets and sends the target URL through WireMock's HTTP client. A webhook must be configured and triggered by attacker-influenced input; impact is limited to outbound POST effects on services reachable from the server.

The record

CVE
CVE-2023-41327
Published
Sep 6, 2023
Updated
Sep 26, 2024
Vendor
WireMock
Product
WireMock
Classifications
CWE-918, 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=org.wiremock:wiremock-webhooks-extension: >= 2.0.0, < 2.35.1
  2. Affected versionversion=org.wiremock:wiremock-webhooks-extension: >= 3.0.0, < 3.0.3
  3. Affected versionversion=wiremock-studio: All versions

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

WireMock · WireMockversion=org.wiremock:wiremock-webhooks-extension: >= 2.0.0, < 2.35.1; version=org.wiremock:wiremock-webhooks-extension: >= 3.0.0, < 3.0.3; version=wiremock-studio: All versions

Published CVSS scores

4.6GitHub, Inc.CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L
5.4NIST NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitUnconfirmed

Weakness, pattern, technique

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

Public exploit references

No public exploit references are available in this record.

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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