CVE-2025-11720

EUVD-2025-34194
The Firefox and Firefox Focus UI for the Android custom tab feature only showed the "site" that was loaded, not the full hostname. User supplied content hosted on a subdomain of a site could have been used to fool a user into thinking it was content from a different subdomain of that site. This vulnerability affects Firefox < 144.
UI
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
8.1 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
CISA-ADPADP
8.1 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 21%
Affected Products (NVD)
VendorProductVersion
mozillafirefox
𝑥
< 144.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
firefox
sid
148.0-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
firefox
jammy
not-affected
noble
not-affected
plucky
not-affected
questing
not-affected
thunderbird
jammy
not-affected
noble
not-affected
plucky
not-affected
questing
not-affected
mozjs38
bionic
needs-triage
jammy
dne
noble
dne
plucky
dne
questing
dne
mozjs52
bionic
ignored
focal
ignored
jammy
dne
noble
dne
plucky
dne
questing
dne
mozjs68
focal
ignored
jammy
dne
noble
dne
plucky
dne
questing
dne
mozjs78
jammy
ignored
noble
dne
plucky
dne
questing
dne
mozjs91
jammy
ignored
noble
dne
plucky
dne
questing
dne
mozjs102
jammy
ignored
noble
ignored
plucky
dne
questing
dne
mozjs115
jammy
dne
noble
ignored
plucky
ignored
questing
dne