CVE-2023-23602

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

Medium · published June 2, 2023

CVSS v3.1
6.5
EPSS
1%
Percentile
48.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00601 · 48.1th percentile
Published
2023-06-02T00:00Z
EPSS history
Timeline
  • 02 JUN 00:00Z
    Content Security Policy wasn't being correctly applied to WebSockets in WebWorkers
    cvelistv5