CVE-2023-25730
MediumCVSS 5.4Exploitation Probability (EPSS)
Low risk45th percentile - higher than 45% of all known CVEs
Summary
A background script invoking requestFullscreen and then blocking the main thread could force the browser into fullscreen mode indefinitely, resulting in potential user confusion or spoofing attacks. This vulnerability affects Firefox < 110, Thunderbird < 102.8, and Firefox ESR < 102.8.
Risk Assessment
This could lead to phishing and user deception. Organizations are at risk of fraud and loss of trust.
Recommendation
Update Firefox to version 110 or later, Thunderbird to 102.8 or later, and Firefox ESR to 102.8 or later.
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Original NVD description (English source)
A background script invoking <code>requestFullscreen</code> and then blocking the main thread could force the browser into fullscreen mode indefinitely, resulting in potential user confusion or spoofing attacks. This vulnerability affects Firefox < 110, Thunderbird < 102.8, and Firefox ESR < 102.8.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS