If temporary "one-time" permissions, such as the ability to use the Camera, were granted to a document loaded using a file: URL, that permission persisted in that tab for all other documents loaded from a file: URL. This is potentially dangerous if the local files came from different sources, such as in a download directory. This vulnerability affects Firefox < 111.

References

• https://nvd.nist.gov/vuln/detail/CVE-2023-28161
• https://bugzilla.mozilla.org/show_bug.cgi?id=1811181
• https://www.mozilla.org/security/advisories/mfsa2023-09