What’s Vulnerable › Vulnerabilities

CVE-2017-1000209

• Severity: medium (CVSS 5.9 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-11-17 · updated 2026-06-17
• Weakness: CWE-295

Description

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.

Affected products

• Nv-Websocket-Client Project Nv-Websocket-Client: through 2.2

References

• https://github.com/TakahikoKawasaki/nv-websocket-client/pull/107
• https://github.com/TakahikoKawasaki/nv-websocket-client/pull/107

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