DEBIAN-CVE-2025-3932

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...

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,...

UBUNTU-CVE-2025-3932

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...

CVE-2025-3932 Tracking Links in Attachments Bypassed Remote Content Blocking

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...

CVE-2025-3932

The CVE-2025-3932 issue concerns Thunderbird where an email could display a tracking link as an attachment; when opened, Thunderbird could access the external URL via the X-Mozilla-External-Attachment-URL header despite remote content blocking. Affected products: Thunderbird versions earlier than...

CVE-2025-3909

Thunderbird (email client) is affected by CVE-2025-3909 via the X-Mozilla-External-Attachment-URL header. An attacker could craft a nested message/rfc822 attachment with content type application/pdf, causing Thunderbird to render it as HTML and execute JavaScript in the file:/// context after aut...

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,...

CVE-2025-3909 JavaScript Execution via Spoofed PDF Attachment and file:/// Link

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,...

CVE-2025-3932 Tracking Links in Attachments Bypassed Remote Content Blocking

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...

Mozilla Thunderbird 安全漏洞

Mozilla Thunderbird is the United States Mozilla Foundation's set of independent from the Mozilla Application Suite e-mail client software. The program supports IMAP, POP mail protocols and HTML mail format. A cross-site scripting vulnerability exists in Mozilla Thunderbird, which stems from...

Mozilla Thunderbird < 138.0.1

The version of Thunderbird installed on the remote macOS or Mac OS X host is prior to 138.0.1. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2025-35 advisory. - It was possible to craft an email that showed a tracking link as an attachment. If the user attempted ...

thunderbird: User Interface (UI) Misrepresentation of attachment URL

A flaw was found in Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: When an email contains multiple attachments with external links via the X-Mozilla-External-Attachment-URL header, only the last link is shown when hovering over any attachment. Although the...

thunderbird: Leak of hashed Window credentials via crafted attachment URL

A flaw was found in Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Thunderbird processes the X-Mozilla-External-Attachment-URL header to handle attachments which can be hosted externally. When an email is opened, Thunderbird accesses the specified URL to...

thunderbird: Information Disclosure of /tmp directory listing

A flaw was found in Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: By crafting a malformed file name for an attachment in a multipart message, an attacker can trick Thunderbird into including a directory listing of /tmp when the message is forwarded or edit...

thunderbird: Leak of hashed Window credentials via crafted attachment URL

A flaw was found in Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Thunderbird processes the X-Mozilla-External-Attachment-URL header to handle attachments which can be hosted externally. When an email is opened, Thunderbird accesses the specified URL to...

thunderbird: User Interface (UI) Misrepresentation of attachment URL

A flaw was found in Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: When an email contains multiple attachments with external links via the X-Mozilla-External-Attachment-URL header, only the last link is shown when hovering over any attachment. Although the...

PT-2025-21187

Name of the Vulnerable Software and Affected Versions: Thunderbird versions prior to 128.10.1 Thunderbird versions prior to 138.0.1 Description: The issue arises from Thunderbird's handling of the X-Mozilla-External-Attachment-URL header, which can be exploited to execute JavaScript in the file:/...

Security Vulnerabilities fixed in Thunderbird 138.0.1 — Mozilla

Thunderbird parses addresses in a way that can allow sender spoofing in case the server allows an invalid From address to be used. For example, if the From header contains an invalid value "Spoofed Name [email protected] [email protected]", Thunderbird treats [email protected] as the...

Security Vulnerabilities fixed in Thunderbird 128.10.1 — Mozilla

Thunderbird parses addresses in a way that can allow sender spoofing in case the server allows an invalid From address to be used. For example, if the From header contains an invalid value "Spoofed Name [email protected] [email protected]", Thunderbird treats [email protected] as the...

thunderbird: Leak of hashed Window credentials via crafted attachment URL

A flaw was found in Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Thunderbird processes the X-Mozilla-External-Attachment-URL header to handle attachments which can be hosted externally. When an email is opened, Thunderbird accesses the specified URL to...