Bug 2366297 (CVE-2025-3932) - CVE-2025-3932 thunderbird: Tracking Links in Attachments Bypassed Remote Content Blocking
Summary: CVE-2025-3932 thunderbird: Tracking Links in Attachments Bypassed Remote Cont...
Keywords:
Status: NEW
Alias: CVE-2025-3932
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-05-14 18:02 UTC by OSIDB Bzimport
Modified: 2025-05-20 18:08 UTC (History)
5 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)

Description OSIDB Bzimport 2025-05-14 18:02:02 UTC 
It was possible to craft an email that showed a tracking link as an attachment. If the user attempted to open the attachment, Thunderbird automatically accessed the link. The configuration to block remote content did not prevent that. Thunderbird has been fixed to no longer allow access to web pages listed in the X-Mozilla-External-Attachment-URL header of an email. This vulnerability affects Thunderbird < 128.10.1 and Thunderbird < 138.0.1.
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