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CVE-2020-11050

22
FAUCET Score

CVE-2020-11050 describes an Improper Validation of Certificate with Host Mismatch vulnerability in Java-WebSocket versions 1.4.1 and earlier, specifically affecting the WebSocketClient which fails to perform SSL hostname validation. This high-severity vulnerability (CVSS 8.1) allows an unauthenticated attacker to achieve high impact on confidentiality, integrity, and availability with high attack complexity. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.4.1CPE matchmatch criteria
cpe:2.3:a:java-websocket_project:java-websocket:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.0CRITICAL

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.77%
Probability of exploitation in next 30 days
EPSS Percentile
51.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0077 is in the 20th percentile among its peer group of 8,915 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

mavenpatch availablevia ghsa
Product: org.java-websocket:Java-WebSocketFixed in: 1.5.0

Vendor Advisories (2)

mavenGHSA-gw55-jm4h-x339high

Improper Validation of Certificate with Host Mismatch in Java-WebSocket

May 8, 2020
redhatCVE-2020-11050Important

java-websocket: WebSocketClient does not perform SSL hostname validation

May 7, 2020

References

github.com / TooTallNate/Java-WebSocket/security/advisories/GHSA-gw55-jm4h-x339
Third Party Advisory