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CVE Vulnerability Details :
CVE-2025-3523
PUBLISHED
More InfoOfficial Page
Assigner-mozilla
Assigner Org ID-f16b083a-5664-49f3-a51e-8d479e5ed7fe
View Known Exploited Vulnerability (KEV) details
Published At-15 Apr, 2025 | 15:06
Updated At-13 Apr, 2026 | 14:28
Rejected At-
▼CVE Numbering Authority (CNA)
User Interface (UI) Misrepresentation of attachment URL

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.

Affected Products
Vendor
Mozilla CorporationMozilla
Product
Thunderbird
Versions
Unaffected
  • From 128.9.2 through 128.* (rpm)
  • From 137.0.2 through * (rpm)
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Dario Weißer
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://bugzilla.mozilla.org/show_bug.cgi?id=1958385
N/A
https://www.mozilla.org/security/advisories/mfsa2025-26/
N/A
https://www.mozilla.org/security/advisories/mfsa2025-27/
N/A
Hyperlink: https://bugzilla.mozilla.org/show_bug.cgi?id=1958385
Resource: N/A
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2025-26/
Resource: N/A
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2025-27/
Resource: N/A
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Problem Types
TypeCWE IDDescription
CWECWE-451CWE-451 User Interface (UI) Misrepresentation of Critical Information
Type: CWE
CWE ID: CWE-451
Description: CWE-451 User Interface (UI) Misrepresentation of Critical Information
Metrics
VersionBase scoreBase severityVector
3.16.4MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:L
Version: 3.1
Base score: 6.4
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:L
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found