CVE-2017-1000209 json
nv-websocket-client allows attackers to spoof SSL/TLS servers via an arbitrary valid certificate
published 2017-11-17 8 y ago modified 2026-06-17 4 mo ago also GHSA-4hxv-95rc-jqg7 , EUVD-2022-2390
- cvss
- 5.9
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 51%
- public exploits
- 0
- none known
Summary
The Java WebSocket client nv-websocket-client does not verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL/TLS servers via an arbitrary valid certificate.
Patch / fix
- maven com.neovisionaries:nv-websocket-client 2.1
- github.com/TakahikoKawasaki/nv-websocket-client#107 pull request
Exploit prediction
0.66% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 5.9 | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:P/I:N/A:N |
| GitHub | 3.0 | 5.9 | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | com.neovisionaries:nv-websocket-client | <2.1 |
2.1 |
Classification
- Weakness
-
- CWE-295 Improper Certificate Validation
References
-
github.com
/TakahikoKawasaki/nv-websocket-client/pull/107
web, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2017-1000209
advisory
Sources
- CVE List CVE-2017-1000209
- GitHub Advisory GHSA-4hxv-95rc-jqg7
- NVD CVE-2017-1000209
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