### [CVE-2022-29909](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-29909)
![](https://img.shields.io/static/v1?label=Product&message=Firefox%20ESR&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=Firefox&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=Thunderbird&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3C%20100%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2091.9%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Bypassing%20permission%20prompt%20in%20nested%20browsing%20contexts&color=brighgreen)

### Description

Documents in deeply-nested cross-origin browsing contexts could have obtained permissions granted to the top-level origin, bypassing the existing prompt and wrongfully inheriting the top-level permissions. This vulnerability affects Thunderbird < 91.9, Firefox ESR < 91.9, and Firefox < 100.

### POC

#### Reference
- https://bugzilla.mozilla.org/show_bug.cgi?id=1755081

#### Github
No PoCs found on GitHub currently.