CVE-2025-3523
thunderbird: User Interface (UI) Misrepresentation of attachment URL
Severity Score
6.4
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
Track
*SSVC
Descriptions
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.
Multiple security issues were discovered in Thunderbird, which could result in the execution of arbitrary code or information disclosure
*Credits:
Dario Weißer
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:Track
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2025-04-11 CVE Reserved
- 2025-04-15 CVE Published
- 2025-04-15 CVE Updated
- 2025-05-17 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-451: User Interface (UI) Misrepresentation of Critical Information
CAPEC
References (5)
| URL | Tag | Source |
|---|---|---|
| https://bugzilla.mozilla.org/show_bug.cgi?id=1958385 | ||
| https://www.mozilla.org/security/advisories/mfsa2025-26 | ||
| https://www.mozilla.org/security/advisories/mfsa2025-27 |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2025-3523 | 2025-05-13 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2359786 | 2025-05-13 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Mozilla Search vendor "Mozilla" | Thunderbird Search vendor "Mozilla" for product "Thunderbird" | * | - |
Affected
| ||||||
| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | * | - |
Affected
| ||||||
| Slackware Search vendor "Slackware" | Slackware Linux Search vendor "Slackware" for product "Slackware Linux" | * | - |
Affected
| ||||||