VULNERABILITY INTELLIGENCE

CVE-2023-6871

CVSS score4.3 MEDIUM

EPSS probability0.49%

CISA KEVNot currently listed

Published2023-12-19

Last modified2026-06-17

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

Description

Under certain conditions, Firefox did not display a warning when a user attempted to navigate to a new protocol handler. This vulnerability affects Firefox < 121.

Primary references

security@mozilla.org — Issue Tracking, Permissions Required
security@mozilla.org — Third Party Advisory
security@mozilla.org — Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 — Issue Tracking, Permissions Required
af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Vendor Advisory