Vulnerability in Mozilla Firefox
CVE-2023-6871
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.005 (40.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 40.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Mozilla Firefox — versions unspecified
Public proof-of-concept exploits
References
- bugzilla.mozilla.org/show_bug.cgi (Permissions Required, Issue Tracking)
- security.gentoo.org/glsa/202401-10 (Third Party Advisory)
- www.mozilla.org/security/advisories/mfsa2023-56/ (Vendor Advisory)
Frequently asked questions
- What is CVE-2023-6871?
- CVE-2023-6871 is a medium-severity vulnerability in Mozilla Firefox. CVSS score: 4.3/10. Published 2023-12-19.
- How severe is CVE-2023-6871?
- Medium severity. CVSS v3 base score is 4.3 out of 10.
- Is CVE-2023-6871 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.