CVE-2025-3523— User Interface (UI) Misrepresentation of attachment URL
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I. Basic Information for CVE-2025-3523
Vulnerability Information
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Vulnerability Title
User Interface (UI) Misrepresentation of attachment URL
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Mozilla Thunderbird 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mozilla Thunderbird是美国Mozilla基金会的一套从Mozilla Application Suite独立出来的电子邮件客户端软件。该软件支持IMAP、POP邮件协议以及HTML邮件格式。 Mozilla Thunderbird 137.0.2之前版本和128.9.2之前版本存在安全漏洞，该漏洞源于邮件附件悬停显示误导性链接，可能导致用户从不信任来源下载内容。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Mozilla | Thunderbird | 128.9.2 ~ 128.* | - |
II. Public POCs for CVE-2025-3523
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Mozilla · 2025-04-15 · 4 CVEs total
| CVE-2025-2830 | Information Disclosure of /tmp directory listing | |
| CVE-2025-3522 | Leak of hashed Window credentials via crafted attachment URL | |
| CVE-2025-3608 | Race condition in nsHttpTransaction could lead to memory corruption |
IV. Related Vulnerabilities
Same vendor: Mozilla
- CVE-2026-8093
Memory safety bugs fixed in Thunderbird 150.0.2 - CVE-2026-8094
Other issue in the WebRTC component - CVE-2026-8092
Memory safety bugs fixed in Thunderbird ESR 140.10.2 and Thu - CVE-2026-8091
Incorrect boundary conditions in the Audio/Video: Playback c - CVE-2026-8090
Use-after-free in the DOM: Networking component
V. Comments for CVE-2025-3523
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