Vulnerability in Mozilla Firefox
CVE-2023-6206
The black fade animation when exiting fullscreen is roughly the length of the anti-clickjacking delay on permission prompts. It was possible to use this fact to surprise users by luring them to click where the permission grant button would be about to appear. This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.006 (44.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 44.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Mozilla Firefox — versions unspecified
- Mozilla Firefox Esr — versions unspecified
- Mozilla Firefox Esr
- Mozilla Thunderbird — versions unspecified
- Debian Linux — versions 10.0, 11.0, 12.0
Weakness classification (CWE)
References
- bugzilla.mozilla.org/show_bug.cgi (Permissions Required, Issue Tracking)
- www.mozilla.org/security/advisories/mfsa2023-49/ (Release Notes, Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2023-50/ (Release Notes, Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2023-52/ (Release Notes, Vendor Advisory)
- www.debian.org/security/2023/dsa-5561 (Third Party Advisory)
- lists.debian.org/debian-lts-announce/2023/11/msg00017.html (Mailing List)
- lists.debian.org/debian-lts-announce/2023/11/msg00030.html
Frequently asked questions
- What is CVE-2023-6206?
- CVE-2023-6206 is a medium-severity vulnerability in Mozilla Firefox, classified under Improper Restriction of Rendered UI Layers or Frames (Clickjacking). CVSS score: 5.4/10. Published 2023-11-21.
- How severe is CVE-2023-6206?
- Medium severity. CVSS v3 base score is 5.4 out of 10.