CVE-2025-3033

EUVD-2025-9302
After selecting a malicious Windows `.url` shortcut from the local filesystem, an unexpected file could be uploaded.  
*This bug only affects Firefox on Windows. Other operating systems are unaffected.*. This vulnerability was fixed in Firefox 137 and Thunderbird 137.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
mozillaCNA
7.7 HIGH
LOCAL
LOW
NONE
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 6.04%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
mozillafirefox
𝑥
< 137.0
CNA
mozillathunderbird
𝑥
< 137.0
CNA
Debian logo
Debian Releases
Debian Product
Codename
firefox
sid
156.0-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
firefox
focal
dne
jammy
not-affected
noble
not-affected
oracular
not-affected
plucky
not-affected
thunderbird
focal
dne
jammy
not-affected
noble
not-affected
oracular
not-affected
plucky
not-affected
Common Weakness Enumeration
References
https://bugzilla.mozilla.org/show_bug.cgi?id=1950056
https://www.mozilla.org/security/advisories/mfsa2025-20/
https://www.mozilla.org/security/advisories/mfsa2025-23/