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, Firefox ESR < 102.7, and Thunderbird < 102.7.
History

Thu, 18 Dec 2025 15:30:00 +0000

Type Values Removed Values Added
Description 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. 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, Firefox ESR < 102.7, and Thunderbird < 102.7.
Title Mozilla: Content Security Policy wasn't being correctly applied to WebSockets in WebWorkers Content Security Policy wasn't being correctly applied to WebSockets in WebWorkers

Fri, 10 Jan 2025 19:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published: 2023-06-02T00:00:00

Updated: 2025-12-18T15:22:56.025Z

Reserved: 2023-01-16T00:00:00

Link: CVE-2023-23602

cve-icon Vulnrichment

Updated: 2024-08-02T10:35:33.382Z

cve-icon NVD

Status : Modified

Published: 2023-06-02T17:15:10.777

Modified: 2025-12-18T16:15:48.760

Link: CVE-2023-23602

cve-icon Redhat

Severity : Moderate

Publid Date: 2023-01-17T00:00:00Z

Links: CVE-2023-23602 - Bugzilla