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ALSA-2025:8196 — Important: thunderbird security update

Affected: AlmaLinux:10: thunderbird

Mozilla Thunderbird is a standalone mail and newsgroup client.

Security Fix(es):

* thunderbird: JavaScript Execution via Spoofed PDF Attachment and file:/// Link (CVE-2025-3909) * thunderbird: Sender Spoofing via Malformed From Header in Thunderbird (CVE-2025-3875) * thunderbird: Unsolicited File Download, Disk Space Exhaustion, and Credential Leakage via mailbox:/// Links (CVE-2025-3877) * thunderbird: Tracking Links in Attachments Bypassed Remote Content Blocking (CVE-2025-3932)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

bdu:2025-05734

certfr-2025-avi-0411 — De multiples vulnérabilités ont été découvertes dans les produits Mozilla. Certaines d'entre elles permettent à un atta…

certfr-2025-avi-0411

cnvd-2025-18673

EUVD-2026-290712

fkie_cve-2025-3909

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 was fixed in Thunderbird 128.10.1 and Thunderbird 138.0.1.

GHSA-h6cg-6m9j-xj9g

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.

OESA-2025-1835 — thunderbird security update

Affected: openEuler:24.03-LTS-SP2: thunderbird

Mozilla Thunderbird is a standalone mail and newsgroup client. Security Fix(es):

A permission leak could have occurred from a trusted site to an untrusted site via `embed` or `object` elements. This vulnerability affects Firefox < 132, Firefox ESR < 128.4, Firefox ESR < 115.17, Thunderbird < 128.4, and Thunderbird < 132.(CVE-2024-10458)

An attacker could have caused a use-after-free when accessibility was enabled, leading to a potentially exploitable crash. This vulnerability affects Firefox < 132, Firefox ESR < 128.4, Firefox ESR < 115.17, Thunderbird < 128.4, and Thunderbird < 132.(CVE-2024-10459)

The origin of an external protocol handler prompt could have been obscured using a data: URL within an `iframe`. This vulnerability affects Firefox < 132, Firefox ESR < 128.4, Thunderbird < 128.4, and Thunderbird < 132.(CVE-2024-10460)

In multipart/x-mixed-replace responses, `Content-Disposition: attachment` in the response header was not respected and did not force a download, which could allow XSS attacks. This vulnerability affects Firefox < 132, Firefox ESR < 128.4, Thunderbird < 128.4, and Thunderbird < 132.(CVE-2024-10461)

Truncation of a long URL could have allowed origin spoofing in a permission prompt. This vulnerability affects Firefox < 132, Firefox ESR < 128.4, Thunderbird < 128.4, and Thunderbird < 132.(CVE-2024-10462)

Video frames could have been leaked between origins in some situations. Thi…

openSUSE-SU-2025:15131-1 — MozillaThunderbird-128.10.1-1.1 on GA media

MozillaThunderbird-128.10.1-1.1 on GA media

RHSA-2025:8196 — Red Hat Security Advisory: thunderbird security update

thunderbird: Sender Spoofing via Malformed From Header in Thunderbird thunderbird: Unsolicited File Download, Disk Space Exhaustion, and Credential Leakage via mailbox:/// Links thunderbird: JavaScript Execution via Spoofed PDF Attachment and file:/// Link thunderbird: Tracking Links in Attachments Bypassed Remote Content Blocking

SUSE-SU-2025:01660-1 — Security update for MozillaThunderbird

Security update for MozillaThunderbird

UBUNTU-CVE-2025-3909

Affected: Ubuntu:22.04:LTS: thunderbird

WID-SEC-W-2025-1062 — Mozilla Thunderbird: Mehrere Schwachstellen

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Mozilla Thunderbird ausnutzenum beliebigen Programmcode auszuführen, vertrauliche Informationen preiszugeben, einen Denial-of-Service-Zustand herbeizuführen oder Absender-Spoofing durchzuführen und Sicherheitsmaßnahmen zu umgehen.