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CVE-2025-66902

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Date: January 19, 2026

An input validation issue in in Pithikos websocket-server v.0.6.4 allows a remote attacker to obtain sensitive information or cause unexpected server behavior via the websocket_server/websocket_server.py, WebSocketServer._message_received components.

Severity Score

Related Resources (3)

https://nvd.nist.gov/vuln/detail/CVE-2025-66902
https://github.com/cyberinvest211/websocket-server-vuln-poc/tree/main
https://www.mend.io/vulnerability-database/CVE-2025-66902

Severity Score

Weakness Type (CWE)

Improper Input Validation

CWE-20

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): NONE
Availability (A): NONE

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