CVE-2025-11720

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
NISTNIST
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
mozillaCNA
---
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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: 14%
VendorProductVersion
mozillafirefox
𝑥
< 144.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
firefox
sid
145.0.1-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
firefox
questing
not-affected
plucky
not-affected
noble
not-affected
jammy
not-affected
thunderbird
questing
not-affected
plucky
not-affected
noble
not-affected
jammy
not-affected
mozjs38
questing
dne
plucky
dne
noble
dne
jammy
dne
bionic
needs-triage
mozjs52
questing
dne
plucky
dne
noble
dne
jammy
dne
focal
ignored
bionic
ignored
mozjs68
questing
dne
plucky
dne
noble
dne
jammy
dne
focal
ignored
mozjs78
questing
dne
plucky
dne
noble
dne
jammy
ignored
mozjs91
questing
dne
plucky
dne
noble
dne
jammy
ignored
mozjs102
questing
dne
plucky
dne
noble
ignored
jammy
ignored
mozjs115
questing
dne
plucky
ignored
noble
ignored
jammy
dne