CVE-2025-0239

EUVD-2025-1571
When using Alt-Svc, ALPN did not properly validate certificates when the original server is redirecting to an insecure site. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
mozillaCNA
4 MEDIUM
LOCAL
LOW
NONE
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 12.46%
Affected Products (NVD)
VendorProductVersion
mozillathunderbird
𝑥
< 128.6.0
𝑥
= Vulnerable software versions
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
mozillafirefox
𝑥
< 134.0
CNA
mozillafirefox_esr
116.0.0 ≤
𝑥
< 128.6.0
CNA
mozillathunderbird
129.0 ≤
𝑥
< 134.0
CNA
mozillathunderbird_esr
𝑥
< 128.6.0
CNA
Debian logo
Debian Releases
Debian Product
Codename
firefox
sid
158.0-1
fixed
firefox-esr
bookworm
140.12.0esr-1~deb12u1
fixed
bookworm (security)
153.5.0esr-1~deb12u1
fixed
forky
153.5.0esr-1
fixed
sid
153.5.0esr-1
fixed
trixie
140.15.0esr-1~deb13u1
fixed
trixie (security)
153.5.0esr-1~deb13u1
fixed
thunderbird
bookworm
1:140.12.0esr-1~deb12u1
fixed
bookworm (security)
1:140.17.0esr-1~deb12u1
fixed
forky
1:153.4.0esr-1
fixed
sid
1:153.5.0esr-1
fixed
trixie
1:140.12.0esr-1~deb13u1
fixed
trixie (security)
1:140.17.0esr-1~deb13u1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
mozjs52
bionic
ignored
focal
needs-triage
jammy
dne
noble
dne
oracular
dne
plucky
dne
questing
dne
resolute
dne
firefox
focal
Fixed 134.0+build1-0ubuntu0.20.04.1
released
jammy
not-affected
noble
not-affected
oracular
not-affected
plucky
not-affected
questing
not-affected
resolute
not-affected
mozjs102
focal
dne
jammy
ignored
noble
ignored
oracular
dne
plucky
dne
questing
dne
resolute
dne
mozjs115
focal
dne
jammy
dne
noble
ignored
oracular
ignored
plucky
ignored
questing
dne
resolute
dne
mozjs38
bionic
needs-triage
focal
dne
jammy
dne
noble
dne
oracular
dne
plucky
dne
questing
dne
resolute
dne
mozjs68
focal
ignored
jammy
dne
noble
dne
oracular
dne
plucky
dne
questing
dne
resolute
dne
mozjs78
focal
dne
jammy
ignored
noble
dne
oracular
dne
plucky
dne
questing
dne
resolute
dne
mozjs91
focal
dne
jammy
ignored
noble
dne
oracular
dne
plucky
dne
questing
dne
resolute
dne
thunderbird
focal
dne
jammy
Fixed 1:140.7.1+build1-0ubuntu0.22.04.1
released
noble
not-affected
oracular
not-affected
plucky
not-affected
questing
not-affected
resolute
not-affected
openSUSE logo
openSUSE / SLES Releases
openSUSE Product
Release
MozillaFirefox
suse enterprise desktop 15 SP6
128.6.0-150200.152.167.1
fixed
suse enterprise desktop 15 SP7
128.6.0-150200.152.167.1
fixed
suse enterprise sap 12 SP5
128.6.0-112.243.1
fixed
suse enterprise sap 15 SP3
128.6.0-150200.152.167.1
fixed
suse enterprise sap 15 SP4
128.6.0-150200.152.167.1
fixed
suse enterprise sap 15 SP5
128.6.0-150200.152.167.1
fixed
suse enterprise sap 15 SP6
128.6.0-150200.152.167.1
fixed
suse enterprise sap 15 SP7
128.6.0-150200.152.167.1
fixed
suse enterprise server 12 SP3
128.6.0-112.243.1
fixed
suse enterprise server 12 SP5
128.6.0-112.243.1
fixed
suse enterprise server 15 SP2
128.6.0-150200.152.167.1
fixed
suse enterprise server 15 SP3
128.6.0-150200.152.167.1
fixed
suse enterprise server 15 SP4
128.6.0-150200.152.167.1
fixed
suse enterprise server 15 SP5
128.6.0-150200.152.167.1
fixed
suse enterprise server 15 SP6
128.6.0-150200.152.167.1
fixed
suse enterprise server 15 SP7
128.6.0-150200.152.167.1
fixed
MozillaFirefox-devel
suse enterprise desktop 15 SP6
128.6.0-150200.152.167.1
fixed
suse enterprise sap 12 SP5
128.6.0-112.243.1
fixed
suse enterprise sap 15 SP3
128.6.0-150200.152.167.1
fixed
suse enterprise sap 15 SP4
128.6.0-150200.152.167.1
fixed
suse enterprise sap 15 SP5
128.6.0-150200.152.167.1
fixed
suse enterprise sap 15 SP6
128.6.0-150200.152.167.1
fixed
suse enterprise server 12 SP3
128.6.0-112.243.1
fixed
suse enterprise server 12 SP5
128.6.0-112.243.1
fixed
suse enterprise server 15 SP2
128.6.0-150200.152.167.1
fixed
suse enterprise server 15 SP3
128.6.0-150200.152.167.1
fixed
suse enterprise server 15 SP4
128.6.0-150200.152.167.1
fixed
suse enterprise server 15 SP5
128.6.0-150200.152.167.1
fixed
suse enterprise server 15 SP6
128.6.0-150200.152.167.1
fixed
MozillaFirefox-translations-common
suse enterprise desktop 15 SP6
128.6.0-150200.152.167.1
fixed
suse enterprise desktop 15 SP7
128.6.0-150200.152.167.1
fixed
suse enterprise sap 12 SP5
128.6.0-112.243.1
fixed
suse enterprise sap 15 SP3
128.6.0-150200.152.167.1
fixed
suse enterprise sap 15 SP4
128.6.0-150200.152.167.1
fixed
suse enterprise sap 15 SP5
128.6.0-150200.152.167.1
fixed
suse enterprise sap 15 SP6
128.6.0-150200.152.167.1
fixed
suse enterprise sap 15 SP7
128.6.0-150200.152.167.1
fixed
suse enterprise server 12 SP3
128.6.0-112.243.1
fixed
suse enterprise server 12 SP5
128.6.0-112.243.1
fixed
suse enterprise server 15 SP2
128.6.0-150200.152.167.1
fixed
suse enterprise server 15 SP3
128.6.0-150200.152.167.1
fixed
suse enterprise server 15 SP4
128.6.0-150200.152.167.1
fixed
suse enterprise server 15 SP5
128.6.0-150200.152.167.1
fixed
suse enterprise server 15 SP6
128.6.0-150200.152.167.1
fixed
suse enterprise server 15 SP7
128.6.0-150200.152.167.1
fixed
MozillaFirefox-translations-other
suse enterprise desktop 15 SP6
128.6.0-150200.152.167.1
fixed
suse enterprise desktop 15 SP7
128.6.0-150200.152.167.1
fixed
suse enterprise sap 15 SP3
128.6.0-150200.152.167.1
fixed
suse enterprise sap 15 SP4
128.6.0-150200.152.167.1
fixed
suse enterprise sap 15 SP5
128.6.0-150200.152.167.1
fixed
suse enterprise sap 15 SP6
128.6.0-150200.152.167.1
fixed
suse enterprise sap 15 SP7
128.6.0-150200.152.167.1
fixed
suse enterprise server 15 SP2
128.6.0-150200.152.167.1
fixed
suse enterprise server 15 SP3
128.6.0-150200.152.167.1
fixed
suse enterprise server 15 SP4
128.6.0-150200.152.167.1
fixed
suse enterprise server 15 SP5
128.6.0-150200.152.167.1
fixed
suse enterprise server 15 SP6
128.6.0-150200.152.167.1
fixed
suse enterprise server 15 SP7
128.6.0-150200.152.167.1
fixed
MozillaThunderbird
suse enterprise desktop 15 SP6
128.6.0-150200.8.197.1
fixed
suse enterprise desktop 15 SP7
128.6.0-150200.8.197.1
fixed
suse enterprise sap 15 SP6
128.6.0-150200.8.197.1
fixed
suse enterprise sap 15 SP7
128.6.0-150200.8.197.1
fixed
suse enterprise server 15 SP6
128.6.0-150200.8.197.1
fixed
suse enterprise server 15 SP7
128.6.0-150200.8.197.1
fixed
suse enterprise workstation 15 SP6
128.6.0-150200.8.197.1
fixed
suse enterprise workstation 15 SP7
128.6.0-150200.8.197.1
fixed
MozillaThunderbird-translations-common
suse enterprise desktop 15 SP6
128.6.0-150200.8.197.1
fixed
suse enterprise desktop 15 SP7
128.6.0-150200.8.197.1
fixed
suse enterprise sap 15 SP6
128.6.0-150200.8.197.1
fixed
suse enterprise sap 15 SP7
128.6.0-150200.8.197.1
fixed
suse enterprise server 15 SP6
128.6.0-150200.8.197.1
fixed
suse enterprise server 15 SP7
128.6.0-150200.8.197.1
fixed
suse enterprise workstation 15 SP6
128.6.0-150200.8.197.1
fixed
suse enterprise workstation 15 SP7
128.6.0-150200.8.197.1
fixed
MozillaThunderbird-translations-other
suse enterprise desktop 15 SP6
128.6.0-150200.8.197.1
fixed
suse enterprise desktop 15 SP7
128.6.0-150200.8.197.1
fixed
suse enterprise sap 15 SP6
128.6.0-150200.8.197.1
fixed
suse enterprise sap 15 SP7
128.6.0-150200.8.197.1
fixed
suse enterprise server 15 SP6
128.6.0-150200.8.197.1
fixed
suse enterprise server 15 SP7
128.6.0-150200.8.197.1
fixed
suse enterprise workstation 15 SP6
128.6.0-150200.8.197.1
fixed
suse enterprise workstation 15 SP7
128.6.0-150200.8.197.1
fixed
Red Hat logo
Red Hat Enterprise Linux Releases
Red Hat Product
Release
firefox
RHEL 9
0:128.6.0-1.el9_5
fixed
firefox-x11
RHEL 9
0:128.6.0-1.el9_5
fixed
thunderbird
RHEL 9
0:128.6.0-3.el9_5
fixed
Common Weakness Enumeration
References
https://bugzilla.mozilla.org/show_bug.cgi?id=1929156
https://www.mozilla.org/security/advisories/mfsa2025-01/
https://www.mozilla.org/security/advisories/mfsa2025-02/
https://www.mozilla.org/security/advisories/mfsa2025-04/
https://www.mozilla.org/security/advisories/mfsa2025-05/
https://lists.debian.org/debian-lts-announce/2025/01/msg00004.html