CVE-2025-4035

EUVD-2025-15014
A flaw was found in libsoup. When handling cookies, libsoup clients mistakenly allow cookies to be set for public suffix domains if the domain contains at least two components and includes an uppercase character. This bypasses public suffix protections and could allow a malicious website to set cookies for domains it does not own, potentially leading to integrity issues such as session fixation.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
4.3 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 35.1%
Debian logo
Debian Releases
Debian Product
Codename
libsoup2.4
bookworm
no-dsa
trixie
no-dsa
libsoup3
bookworm
no-dsa
forky
vulnerable
sid
vulnerable
trixie
no-dsa
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
libsoup2.4
bionic
deferred
focal
deferred
jammy
deferred
noble
deferred
oracular
ignored
plucky
ignored
questing
ignored
resolute
deferred
xenial
deferred
libsoup3
focal
dne
jammy
deferred
noble
deferred
oracular
ignored
plucky
ignored
questing
ignored
resolute
deferred
Common Weakness Enumeration
References
https://access.redhat.com/errata/RHSA-2025:8128
https://access.redhat.com/security/cve/CVE-2025-4035
https://bugzilla.redhat.com/show_bug.cgi?id=2362651
https://gitlab.gnome.org/GNOME/libsoup/-/issues/443
https://gitlab.gnome.org/GNOME/libsoup/-/work_items/443