What is CVE-2023-6211?

CVE-2023-6211 is a medium-severity vulnerability in Mozilla Firefox, classified under Improper Restriction of Rendered UI Layers or Frames (Clickjacking). CVSS score: 6.5/10. Published 2023-11-21.

How severe is CVE-2023-6211?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Mozilla Firefox

CVE-2023-6211

If an attacker needed a user to load an insecure http: page and knew that user had enabled HTTPS-only mode, the attacker could have tricked the user into clicking to grant an HTTPS-only exception if they could get the user to participate in a clicking game. This vulnerability affects Firefox < 120.

EPSS: 0.005 (39.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.

Affected products

Mozilla Firefox — versions unspecified

Weakness classification (CWE)

CWE-1021 — Improper Restriction of Rendered UI Layers or Frames (Clickjacking)

References

security@mozilla.org (Permissions Required, Issue Tracking)
security@mozilla.org (Release Notes, Vendor Advisory)
security@mozilla.org

Frequently asked questions

What is CVE-2023-6211?: CVE-2023-6211 is a medium-severity vulnerability in Mozilla Firefox, classified under Improper Restriction of Rendered UI Layers or Frames (Clickjacking). CVSS score: 6.5/10. Published 2023-11-21.
How severe is CVE-2023-6211?: Medium severity. CVSS v3 base score is 6.5 out of 10.