Mozilla · Firefox For Android · CVE-2021-29971
**Name of the Vulnerable Software and Affected Versions**
Firefox for Android versions prior to 90
**Description**
The issue is related to insufficient access control in Firefox for Android, allowing any webpage running on the same host to be granted permissions previously saved by a user, regardless of the scheme or port. This could potentially allow a remote attacker to elevate their privileges. The vulnerability only affects Firefox for Android, with other operating systems being unaffected.
**Recommendations**
For Firefox for Android versions prior to 90, update to version 90 or later to resolve the issue. As a temporary workaround, consider restricting the saving of permission grants to webpages to minimize the risk of exploitation.