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,...

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...

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-2025-3909

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,...

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...

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: 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: 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: 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: 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: 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: 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: 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...

CVE-2025-3522

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 determine file size, and navigates to it when the user clicks the attachment. Because the URL is not validate...

SUSE CVE-2025-3522

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 determine file size, and navigates to it when the user clicks the attachment. Because the URL is not validate...