CVE-2023-23602
MEDIUMFirefox < 109 and Firefox ESR < 102.7 - Content Security Policy Bypass via WebSocket in WebWorker
Title source: llmDescription
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.
References (4)
Core 4
Core References
Issue Tracking, Permissions Required, Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1800890
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/
Scores
CVSS v3
6.5
EPSS
0.0014
EPSS Percentile
33.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-754
Status
published
Products (3)
mozilla/firefox
< 109.0
mozilla/firefox_esr
< 102.7
mozilla/thunderbird
< 102.7
Published
Jun 02, 2023
Tracked Since
Feb 18, 2026