CVE-2023-23602

MediumCVSS 6.5/10Last modified Jun 17, 2026

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, Firefox ESR < 102.7, and Thunderbird < 102.7.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Weakness enumeration

CWE-754

Affected software

Vendor	Product	Versions
Mozilla	Firefox	>= unspecified, < 109
Mozilla	Firefox ESR	>= unspecified, < 102.7
Mozilla	Thunderbird	>= unspecified, < 102.7

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1800890Issue Tracking, Permissions Required, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-01/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-02/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-03/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1800890Issue Tracking, Permissions Required, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-01/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-02/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-03/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1800890Issue Tracking, Permissions Required, Vendor Advisory

Timeline

Published: Jun 2, 2023
Last modified: Jun 17, 2026
NVD status: Modified

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