Description

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 was fixed in Thunderbird 128.10.1 and Thunderbird 138.0.1.

INFO

Published Date :

2025-05-14T16:56:43.939Z

Last Modified :

2026-04-13T14:27:54.782Z

Source :

mozilla
AFFECTED PRODUCTS

The following products are affected by CVE-2025-3932 vulnerability.

Vendors Products
Mozilla
  • Thunderbird
Redhat
  • Enterprise Linux
  • Rhel Aus
  • Rhel E4s
  • Rhel Eus
  • Rhel Tus
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-3932.

URL Resource
https://bugzilla.mozilla.org/show_bug.cgi?id=1960412 cve-icon cve-icon
https://lists.debian.org/debian-lts-announce/2025/05/msg00022.html cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-3932 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-3932 cve-icon
https://www.mozilla.org/en-US/security/advisories/mfsa2025-34/#CVE-2025-3932 cve-icon
https://www.mozilla.org/security/advisories/mfsa2025-34/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2025-35/ cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact