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Case File

CVE-2020-26953

MEDIUM · CVSS 4.3 EPSS 1.27%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2020-12-09 · Last synced 2026-08-04

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 4.3. It affects Firefox.

CVE
CVE-2020-26953
Severity
MEDIUM
CVSS
4.3
EPSS
1.27%
Firefox

Original NVD Description

It was possible to cause the browser to enter fullscreen mode without displaying the security UI; thus making it possible to attempt a phishing attack or otherwise confuse the user. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.

Related CVEs

Other vulnerabilities affecting the same vendor(s)