The following table lists the changes that have been made to the
CVE-2025-3909 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.
May. 14, 2025
| Action | Type | Old Value | New Value |
|---|---|---|---|
| Added | 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 < 128.10.1 and Thunderbird < 138.0.1. | |
| Added | Reference | https://bugzilla.mozilla.org/show_bug.cgi?id=1958376 | |
| Added | Reference | https://www.mozilla.org/security/advisories/mfsa2025-34/ | |
| Added | Reference | https://www.mozilla.org/security/advisories/mfsa2025-35/ |
CVE ID : CVE-2025-10304 Published : Dec. 3, 2025, 3:27 a.m. | 26 minutes ago Description : The Everest Backup –
CVE ID : CVE-2025-12585 Published : Dec. 3, 2025, 3:27 a.m. | 26 minutes ago Description : The MxChat – AI
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