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
CWE
  • CWE-288 - Authentication Bypass Using an Alternate Path or Channel
Assigner
References
Impacted products
Vendor Product Version
Mozilla Thunderbird Unaffected: 128.10.1 , ≤ 128.* (rpm)
Unaffected: 138.0.1 , ≤ * (rpm)
Create a notification for this product.
Credits
Dario Weißer
Show details on NVD website
To clipboard 

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Sightings

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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