How severe is CVE-2020-11050?

CVE-2020-11050 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-11050 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-11050?

CVE-2020-11050 affects Java-websocket Project Java-websocket. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-11050?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2020-11050 published?

CVE-2020-11050 was published on 2020-05-07 and last updated on 2026-06-17.

CVE-2020-11050

CVE-2020-11050 is a critical-severity vulnerability in Java-websocket Project Java-websocket with a CVSS 3.x base score of 9.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-295.

Key facts

Severity: Critical (CVSS 3.x base score 9.0)
CVSS v2: 6.8
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-295
Affected product: Java-websocket Project Java-websocket
Published: 2020-05-07
Last modified: 2026-06-17

Description

In Java-WebSocket less than or equal to 1.4.1, there is an Improper Validation of Certificate with Host Mismatch where WebSocketClient does not perform SSL hostname validation. This has been patched in 1.5.0.

Frequently asked questions

What is CVE-2020-11050?: In Java-WebSocket less than or equal to 1.4.1, there is an Improper Validation of Certificate with Host Mismatch where WebSocketClient does not perform SSL hostname validation. This has been patched in 1.5.0.
How severe is CVE-2020-11050?: CVE-2020-11050 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-11050 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-11050?: CVE-2020-11050 affects Java-websocket Project Java-websocket. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-11050?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-11050 published?: CVE-2020-11050 was published on 2020-05-07 and last updated on 2026-06-17.

References

https://github.com/TooTallNate/Java-WebSocket/security/advisories/GHSA-gw55-jm4h-x339

Affected products (1)

cpe:2.3:a:java-websocket_project:java-websocket:*:*:*:*:*:*:*:*

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