vulnerability
Debian: CVE-2025-3909: thunderbird -- security update
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 9 | (AV:N/AC:M/Au:N/C:P/I:C/A:C) | May 14, 2025 | May 20, 2025 | May 21, 2025 |
Severity
9
CVSS
(AV:N/AC:M/Au:N/C:P/I:C/A:C)
Published
May 14, 2025
Added
May 20, 2025
Modified
May 21, 2025
Description
Thunderbird's handling of the X-Mozilla-External-Attachment-URL header can be exploited to execute JavaScript in the file:/// context. By crafting a nested email attachment (message/rfc822) and setting its content type to application/pdf, Thunderbird may incorrectly render it as HTML when opened, allowing the embedded JavaScript to run without requiring a file download. This behavior relies on Thunderbird auto-saving the attachment to /tmp and linking to it via the file:/// protocol, potentially enabling JavaScript execution as part of the HTML. This vulnerability affects Thunderbird
Solution
debian-upgrade-thunderbird
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