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CVE-2025-3523

User Interface (UI) Misrepresentation of attachment URL

Published: Apr 15, 2025Updated: Apr 13, 2026 Sources: CVE List NVD BDUCWE-451
6.4MEDIUM
NVD MITRE
EPSS Score
0.3%
Top 82.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

When an email contains multiple attachments with external links via the X-Mozilla-External-Attachment-URL header, only the last link is shown when hovering over any attachment. Although the correct link is used on click, the misleading hover text could trick users into downloading content from untrusted sources. This vulnerability was fixed in Thunderbird 137.0.2 and Thunderbird 128.9.2.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:RS:UC:LI:HA:L
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:HIntegrity
High
A:LAvailability
Low
Open in CVSS calculator →

Weaknesses

CWE-451

Affected Products

Mozilla Corp.
oss-project·USaka Mozilla
ThunderbirdOn-premDesktop App
Communications / email-server-client
Thunderbird ESR
Consumer Software
ООО «РусБИТех-Астра»
commercial·RUaka rusbitech-astra
Astra Linux Special EditionOn-premOS
Operating Systems / linux-distro
АО «ИВК»
commercial·RUaka ivk
АЛЬТ СП 10On-premOS
Operating Systems / linux-distro
and 2 more affected products View all →

Exploitability

Official Patch Available
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References

https://www.mozilla.org/security/advisories/mfsa2025-26/
mozilla.org
https://www.mozilla.org/security/advisories/mfsa2025-27/
mozilla.org
https://wiki.astralinux.ru/astra-linux-se17-bulletin-2025-0923SE17
wiki.astralinux.ru
and 2 more references View all →

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