CVE-2023-23602

Content Security Policy wasn't being correctly applied to WebSockets in WebWorkers

CVSS 6.5 MEDIUMEPSS 0.6%CWE-754

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 6.5EPSS 0.6%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

02 Jun 2023Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

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

Affected products

Mozilla · Firefox Mozilla · Firefox ESR Mozilla · Thunderbird

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References

https://bugzilla.mozilla.org/show_bug.cgi?id=1800890 https://www.mozilla.org/security/advisories/mfsa2023-01/https://www.mozilla.org/security/advisories/mfsa2023-02/https://www.mozilla.org/security/advisories/mfsa2023-03/