CVE-2023-23603

Calls to console.log allowed bypassing Content Security Policy via format directive

Medium · published June 2, 2023

CVSS v3.1
6.5
EPSS
1%
Percentile
50.1
In the wild
Unconfirmed
What it is

Regular expressions used to filter out forbidden properties and values from style directives in calls to `console.log` weren't accounting for external URLs. Data could then be potentially exfiltrated from the browser. 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:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00641 · 50.1th percentile
Published
2023-06-02T00:00Z
EPSS history
Timeline
  • 02 JUN 00:00Z
    Calls to console.log allowed bypassing Content Security Policy via format directive
    cvelistv5