WireMock is a tool for mocking HTTP services. The proxy mode of WireMock, can be protected by the network restrictions configuration, as documented in Preventing proxying to and recording from specific target addresses. These restrictions can be configured using the domain names, and in such a case the configuration is vulnerable to the DNS rebinding attacks. A similar patch was applied in WireMock 3.0.0-beta-15 for the WireMock Webhook Extensions. The root cause of the attack is a defect in the logic which allows for a race condition triggered by a DNS server whose address expires in between the initial validation and the outbound network request that might go to a domain that was supposed to be prohibited. Control over a DNS service is required to exploit this attack, so it has high execution complexity and limited impact. This issue has been addressed in version 2.35.1 of wiremock-jre8 and wiremock-jre8-standalone, version 3.0.3 of wiremock and wiremock-standalone, version 2.6.1 of the python version of wiremock, and versions 2.35.1-1 and 3.0.3-1 of the wiremock/wiremock Docker container. Users are advised to upgrade. Users unable to upgrade should either configure firewall rules to define the list of permitted destinations or to configure WireMock to use IP addresses instead of the domain names.
CVE-2023-41329
This low-severity CVE scores 3.9 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 44% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
- Lower severity and no public exploit yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 6.6
- EG Score
- 3.9(medium)
- EPSS
- 43.2%
- KEV
- Not listed
Published
September 6, 2023
Last Modified
June 17, 2026
References (4)
- security-advisories@githubhttps://github.com/wiremock/wiremock/security/advisories/GHSA-pmxq-pj47-j8j4
- security-advisories@githubhttps://wiremock.org/docs/configuration/#preventing-proxying-to-and-recording-from-specific-target-addresses
- af854a3a-2127-422b-91ae-364da2661108https://github.com/wiremock/wiremock/security/advisories/GHSA-pmxq-pj47-j8j4
- af854a3a-2127-422b-91ae-364da2661108https://wiremock.org/docs/configuration/#preventing-proxying-to-and-recording-from-specific-target-addresses
Affected Packages
(5 across 2 ecosystems)
Maven(4)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| com.github.tomakehurst:wiremock-jre8 | 2.21.0 ... 2.35.0 (29 versions) | 2.35.1 | — |
| com.github.tomakehurst:wiremock-jre8-standalone | 2.21.0 ... 2.35.0 (29 versions) | 2.35.1 | — |
| org.wiremock:wiremock | 3.0.0 ... 3.0.2 (8 versions) | 3.0.3 | — |
| org.wiremock:wiremock-standalone | 3.0.0 ... 3.0.2 (8 versions) | 3.0.3 | — |
PyPI(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| wiremock | 1.0.0 ... 2.6.0a0 (24 versions) | 2.6.1 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 8× in last 7d / 48× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-11 08:26 UTCEPSS rescore
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- 2026-06-24 06:21 UTCNVD updateCVSS v3 → 6.6 · severity → MEDIUM
- 2026-06-23 21:31 UTCEPSS rescore
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- 2026-06-09 21:17 UTCOSV refresh
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- 2026-05-24 17:59 UTCEG score recompute
Frequently asked(5)
What is CVE-2023-41329?
When was CVE-2023-41329 disclosed?
Is CVE-2023-41329 actively exploited?
What is the CVSS score of CVE-2023-41329?
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Dependency Blast Radius
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