WebSocket Connection Bypass Vulnerability in Firefox, Thunderbird, and Firefox ESR

WebSocket Connection Bypass Vulnerability in Firefox, Thunderbird, and Firefox ESR

CVE-2023-23602 · MEDIUM Severity

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

A mishandled security check when creating a WebSocket in a WebWorker caused the Content Security Policy connect-src header to be ignored. This could lead to connections to restricted origins from inside WebWorkers. This vulnerability affects Firefox < 109, Thunderbird < 102.7, and Firefox ESR < 102.7.

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