CVE-2025-3523

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-3523
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 affects Thunderbird < 137.0.2 and Thunderbird < 128.9.2.

6.4 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.6 / Impact : 4.7

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact HIGH

Availability Impact LOW

Scope UNCHANGED

References
Link Resource
https://bugzilla.mozilla.org/show_bug.cgi?id=1958385 Permissions Required
https://www.mozilla.org/security/advisories/mfsa2025-26/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-27/ Vendor Advisory
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
History

13 Jun 2025, 18:51

Type Values Removed Values Added
Summary
  • (es) Cuando un correo electrónico contiene varios archivos adjuntos con enlaces externos mediante el encabezado X-Mozilla-External-Attachment-URL, solo se muestra el último enlace al pasar el cursor sobre cualquier archivo adjunto. Aunque se usa el enlace correcto al hacer clic, el texto engañoso al pasar el cursor podría inducir a los usuarios a descargar contenido de fuentes no confiables. Esta vulnerabilidad afecta a Thunderbird (versión anterior a la 137.0.2) y Thunderbird (versión anterior a la 128.9.2).
References () https://bugzilla.mozilla.org/show_bug.cgi?id=1958385 - () https://bugzilla.mozilla.org/show_bug.cgi?id=1958385 - Permissions Required
References () https://www.mozilla.org/security/advisories/mfsa2025-26/ - () https://www.mozilla.org/security/advisories/mfsa2025-26/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2025-27/ - () https://www.mozilla.org/security/advisories/mfsa2025-27/ - Vendor Advisory
First Time Mozilla
Mozilla thunderbird
CPE cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*

15 Apr 2025, 18:15

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 6.4
CWE CWE-451

15 Apr 2025, 15:16

Type Values Removed Values Added
New CVE
Information

Published : 2025-04-15 15:16

Updated : 2025-06-13 18:51

NVD link : CVE-2025-3523

Mitre link : CVE-2025-3523

CVE.ORG link : CVE-2025-3523

JSON object : View

Products Affected

mozilla

  • thunderbird
CWE
CWE-451

User Interface (UI) Misrepresentation of Critical Information