Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2025-3522— Leak of hashed Window credentials via crafted attachment URL

Quick assessment

Affected
Mozilla Thunderbird
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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X-Mozilla-External-Attachment-URL头未验证，可能导致Windows凭据泄露。

AI Predicted 8.6 Difficulty: Easy EPSS 0.27% · P17
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2025-3522

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Leak of hashed Window credentials via crafted attachment URL
Source: CVE Program / CVE List V5
Vulnerability Description
Thunderbird processes the X-Mozilla-External-Attachment-URL header to handle attachments which can be hosted externally. When an email is opened, Thunderbird accesses the specified URL to determine file size, and navigates to it when the user clicks the attachment. Because the URL is not validated or sanitized, it can reference internal resources like chrome:// or SMB share file:// links, potentially leading to hashed Windows credential leakage and opening the door to more serious security issues. This vulnerability was fixed in Thunderbird 137.0.2 and Thunderbird 128.9.2.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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X-Mozilla-External-Attachment-URL头未验证，可能导致Windows凭据泄露。
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-2025-3522

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2025-3522

请登录查看更多情报信息。

Vendor Advisories for CVE-2025-3522 (2)

Same Patch Batch · Mozilla · 2025-04-15 · 4 CVEs total

CVE-2025-2830 Information Disclosure of /tmp directory listing
CVE-2025-3523 User Interface (UI) Misrepresentation of attachment URL
CVE-2025-3608 Race condition in nsHttpTransaction could lead to memory corruption

IV. Related Vulnerabilities

Same product: Thunderbird
Same vendor: Mozilla

V. Comments for CVE-2025-3522

No comments yet

Leave a comment