Related Vulnerabilities: CVE-2021-23957  

A security issue was found in Firefox before version 85.0. Navigations through the Android-specific intent URL scheme could have been misused to escape the iframe sandbox. Note: This issue only affected Firefox for Android. Other operating systems are unaffected.

Severity Medium

Remote Yes

Type Sandbox escape

Description

A security issue was found in Firefox before version 85.0. Navigations through the Android-specific intent URL scheme could have been misused to escape the iframe sandbox.

Note: This issue only affected Firefox for Android. Other operating systems are unaffected.

AVG-1493 firefox 84.0.2-1 85.0-1 Medium Not affected

https://www.mozilla.org/en-US/security/advisories/mfsa2021-03/#CVE-2021-23957
https://bugzilla.mozilla.org/show_bug.cgi?id=1584582