A malicious website could have used a combination of exiting fullscreen mode and requestPointerLock to cause the user's mouse to be re-positioned unexpectedly, which could have led to user confusion and inadvertently granting permissions they did not intend to grant. This vulnerability affects Firefox < 123 and Firefox ESR < 115.8.

References

• https://nvd.nist.gov/vuln/detail/CVE-2024-1550
• https://bugzilla.mozilla.org/show_bug.cgi?id=1860065
• https://www.mozilla.org/security/advisories/mfsa2024-05
• https://www.mozilla.org/security/advisories/mfsa2024-06
• https://www.mozilla.org/security/advisories/mfsa2024-07
• https://lists.debian.org/debian-lts-announce/2024/03/msg00000.html
• https://lists.debian.org/debian-lts-announce/2024/03/msg00001.html