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.
CVSS Details
- CVSS 3.1 Base Score: 6.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade thunderbird | Jun 12, 2025 | May 14, 2025 |
| Amazon Linux Ami 2 | — | Upgrade thunderbird-debuginfoUpgrade thunderbird | May 30, 2025 | May 14, 2025 |
| Debian | — | Upgrade thunderbird | May 20, 2025 | May 14, 2025 |
| Mozilla Thunderbird | — | Upgrade to Mozilla Thunderbird version 138.0.1 | May 15, 2025 | May 13, 2025 |
| Oracle_linux | — | Upgrade thunderbird | May 29, 2025 | May 14, 2025 |
| Redhat_linux | — | Upgrade thunderbird-debuginfoNo solution existsUpgrade thunderbirdUpgrade thunderbird-debugsource | May 29, 2025 | May 14, 2025 |
| Rocky_linux | — | Upgrade thunderbird-debugsourceUpgrade thunderbird-debuginfoUpgrade thunderbird | Sep 9, 2025 | Jul 29, 2025 |
| Suse | — | Upgrade mozillathunderbird-translations-commonUpgrade mozillathunderbird-translations-otherUpgrade mozillathunderbird | May 26, 2025 | May 14, 2025 |
| Ubuntu | — | Upgrade thunderbird | Jul 23, 2025 | May 14, 2025 |
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