When Multi-Account Containers was enabled, DNS requests could have bypassed a SOCKS proxy when the domain name was invalid or the SOCKS proxy was not responding. This vulnerability affects Firefox < 140.
https://www.mozilla.org/security/advisories/mfsa2025-51/
https://bugzilla.mozilla.org/show_bug.cgi?id=1943804
Source: Mitre, NVD
Published: 2025-06-24
Updated: 2025-06-25
Base Score: 7.5
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P
Severity: High
Base Score: 8.6
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
EPSS: 0.00018