Related Vulnerabilities: CVE-2021-23977  

Firefox for Android before version 86.0 suffered from a time-of-check-time-of-use vulnerability that allowed a malicious application to read sensitive data from application directories. Note: This issue is only affected Firefox for Android. Other operating systems are unaffected.

Severity Medium

Remote No

Type Information disclosure

Description

Firefox for Android before version 86.0 suffered from a time-of-check-time-of-use vulnerability that allowed a malicious application to read sensitive data from application directories.

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

AVG-1600 firefox 85.0.2-1 86.0-1 Medium Not affected

https://www.mozilla.org/en-US/security/advisories/mfsa2021-07/#CVE-2021-23977
https://bugzilla.mozilla.org/show_bug.cgi?id=1684761