CVE-2025-3875

EUVD-2025-14938
Thunderbird parses addresses in a way that can allow sender spoofing in case the server allows an invalid From address to be used. For example, if the From header contains an (invalid) value "Spoofed Name  ", Thunderbird treats spoofed@example.com as the actual address. This vulnerability was fixed in Thunderbird 128.10.1 and Thunderbird 138.0.1.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 59%
Affected Products (NVD)
VendorProductVersion
mozillathunderbird
𝑥
< 128.10.0
mozillathunderbird
129.0 ≤
𝑥
< 138.0.1
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
thunderbird
bookworm
1:140.10.1esr-1~deb12u1
fixed
bookworm (security)
1:140.11.0esr-1~deb12u1
fixed
bullseye
vulnerable
bullseye (security)
1:140.11.0esr-1~deb11u1
fixed
forky
1:140.11.0esr-1
fixed
sid
1:140.11.0esr-1
fixed
trixie
1:140.10.1esr-1~deb13u1
fixed
trixie (security)
1:140.11.0esr-1~deb13u1
fixed
openSUSE logo
openSUSE / SLES Releases
openSUSE Product
Release
MozillaThunderbird
suse enterprise desktop 15 SP6
128.10.1-150200.8.215.1
fixed
suse enterprise desktop 15 SP7
128.10.1-150200.8.215.1
fixed
suse enterprise sap 15 SP6
128.10.1-150200.8.215.1
fixed
suse enterprise sap 15 SP7
128.10.1-150200.8.215.1
fixed
suse enterprise server 15 SP6
128.10.1-150200.8.215.1
fixed
suse enterprise server 15 SP7
128.10.1-150200.8.215.1
fixed
suse enterprise workstation 15 SP6
128.10.1-150200.8.215.1
fixed
suse enterprise workstation 15 SP7
128.10.1-150200.8.215.1
fixed
MozillaThunderbird-translations-common
suse enterprise desktop 15 SP6
128.10.1-150200.8.215.1
fixed
suse enterprise desktop 15 SP7
128.10.1-150200.8.215.1
fixed
suse enterprise sap 15 SP6
128.10.1-150200.8.215.1
fixed
suse enterprise sap 15 SP7
128.10.1-150200.8.215.1
fixed
suse enterprise server 15 SP6
128.10.1-150200.8.215.1
fixed
suse enterprise server 15 SP7
128.10.1-150200.8.215.1
fixed
suse enterprise workstation 15 SP6
128.10.1-150200.8.215.1
fixed
suse enterprise workstation 15 SP7
128.10.1-150200.8.215.1
fixed
MozillaThunderbird-translations-other
suse enterprise desktop 15 SP6
128.10.1-150200.8.215.1
fixed
suse enterprise desktop 15 SP7
128.10.1-150200.8.215.1
fixed
suse enterprise sap 15 SP6
128.10.1-150200.8.215.1
fixed
suse enterprise sap 15 SP7
128.10.1-150200.8.215.1
fixed
suse enterprise server 15 SP6
128.10.1-150200.8.215.1
fixed
suse enterprise server 15 SP7
128.10.1-150200.8.215.1
fixed
suse enterprise workstation 15 SP6
128.10.1-150200.8.215.1
fixed
suse enterprise workstation 15 SP7
128.10.1-150200.8.215.1
fixed
Red Hat logo
Red Hat Enterprise Linux Releases
Red Hat Product
Release
thunderbird
RHEL 9
0:128.10.1-1.el9_6
fixed
Common Weakness Enumeration
References
https://bugzilla.mozilla.org/show_bug.cgi?id=1950629
https://www.mozilla.org/security/advisories/mfsa2025-34/
https://www.mozilla.org/security/advisories/mfsa2025-35/
https://lists.debian.org/debian-lts-announce/2025/05/msg00022.html