CVE-2025-3932 (GCVE-0-2025-3932)

Vulnerability from cvelistv5 – Published: 2025-05-14 16:56 – Updated: 2026-04-13 14:27
VLAI
Title
Tracking Links in Attachments Bypassed Remote Content Blocking
Summary
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.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-05-15 14:40 UTC
CWE
  • CWE-288 - Authentication Bypass Using an Alternate Path or Channel
Assigner
mozilla CNA under the mitre root
CNA scorecard E 38/100 over 683 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Mozilla Thunderbird Unaffected: 128.10.1 , ≤ 128.* (rpm)
Unaffected: 138.0.1 , ≤ * (rpm)
guessed Create a notification for this product.
Credits
Dario Weißer
Show details on NVD website
To clipboard 

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