CVE-2021-23957

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CVSS 3.1

7.4 high

EPSS

<1%p54

Published

Feb 26, 2021 (Feb 26, 2021)

Modified

Jun 17, 2026

Description

Navigations through the Android-specific `intent` URL scheme could have been misused to escape iframe sandbox. Note: This issue only affected Firefox for Android. Other operating systems are unaffected. This vulnerability affects Firefox < 85.

Vendors: mozilla
Products: firefox
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N

NVD CVE.org GitHub PoCs EPSS (0.8%)

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