thunderbird: Unsolicited File Download, Disk Space Exhaustion, and Credential Leakage via mailbox:/// Links

A flaw was found in Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: A crafted HTML email using mailbox:/// links can trigger automatic, unsolicited downloads of .pdf files to the user's desktop or home directory without prompting, even if auto-saving is...

thunderbird: Unsolicited File Download, Disk Space Exhaustion, and Credential Leakage via mailbox:/// Links

A flaw was found in Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: A crafted HTML email using mailbox:/// links can trigger automatic, unsolicited downloads of .pdf files to the user's desktop or home directory without prompting, even if auto-saving is...

CVE-2025-5986

A crafted HTML email using mailbox:/// links can trigger automatic, unsolicited downloads of .pdf files to the user's desktop or home directory without prompting, even if auto-saving is disabled. This behavior can be abused to fill the disk with garbage data e.g. using /dev/urandom on Linux or to...

Security Vulnerabilities fixed in Thunderbird 128.11.1 — Mozilla

A crafted HTML email using mailbox:/// links can trigger automatic, unsolicited downloads of .pdf files to the user's desktop or home directory without prompting, even if auto-saving is disabled. This behavior can be abused to fill the disk with garbage data e.g. using /dev/urandom on Linux or to...

Mozilla Thunderbird < 139.0.2

The version of Thunderbird installed on the remote Windows host is prior to 139.0.2. It is, therefore, affected by a vulnerability as referenced in the mfsa2025-50 advisory. - A crafted HTML email using mailbox:/// links can trigger automatic, unsolicited downloads of .pdf files to the user's...

CVE-2024-23330

Tuta is an encrypted email service. In versions prior to 119.10, an attacker can attach an image in a html mail which is loaded from external resource in the default setting, which should prevent loading of external resources. When displaying emails containing external content, they should be...

CVE-2022-31049

TYPO3 is an open source web content management system. Prior to versions 9.5.34 ELTS, 10.4.29, and 11.5.11, user submitted content was used without being properly encoded in HTML emails sent to users. The actually affected components were mail clients used to view those messages. TYPO3 versions...

CVE-2025-3877

CVE-2025-3877 is rejected/not used; this entry does not represent an active vulnerability.

PT-2025-21186 · Mozilla +5 · Thunderbird +5

Name of the Vulnerable Software and Affected Versions: Thunderbird versions prior to 128.10.1 Thunderbird versions prior to 138.0.1 Description: A crafted HTML email using mailbox:/// links can trigger automatic, unsolicited downloads of .pdf files to the user's desktop or home directory without...

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...

CVE-2025-27156 Tuleap allows content injection via emails sent by the mass emailing features

Tuleap is an Open Source Suite to improve management of software developments and collaboration. The mass emailing features do not sanitize the content of the HTML emails. A malicious user could use this issue to facilitate a phishing attempt or to indirectly exploit issues in the recipients mail...

BIT-TYPO3-2022-31049

TYPO3 is an open source web content management system. Prior to versions 9.5.34 ELTS, 10.4.29, and 11.5.11, user submitted content was used without being properly encoded in HTML emails sent to users. The actually affected components were mail clients used to view those messages. TYPO3 versions...

Tutanota Code Issue Vulnerability

Tutanota is a very security- and privacy-conscious email service from Tuta that encrypts email, contacts, and calendar entries on all devices. A code issue vulnerability exists in Tutanota versions prior to 119.10. An attacker exploiting this vulnerability could attach images to html emails loade...

SUSE CVE-2010-3476

Open Ticket Request System OTRS 2.3.x before 2.3.6 and 2.4.x before 2.4.8 does not properly handle the matching of Perl regular expressions against HTML e-mail messages, which allows remote attackers to cause a denial of service CPU consumption via a large message, a different vulnerability than...

SUSE CVE-2021-46144

Roundcube before 1.4.13 and 1.5.x before 1.5.2 allows XSS via an HTML e-mail message with crafted Cascading Style Sheets CSS token sequences...

USN-5824-1: Thunderbird vulnerabilities

Multiple security issues were discovered in Thunderbird. If a user were tricked into opening a specially crafted website in a browsing context, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, bypass security restrictions, cross-site tracing,...

USN-5824-1 thunderbird vulnerabilities

Multiple security issues were discovered in Thunderbird. If a user were tricked into opening a specially crafted website in a browsing context, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, bypass security restrictions, cross-site tracing,...

CVE-2022-3033

If a Thunderbird user replied to a crafted HTML email containing a meta tag, with the meta tag having the http-equiv="refresh" attribute, and the content attribute specifying an URL, then Thunderbird started a network request to that URL, regardless of the configuration to block remote content. I...

Mozilla: Quoting from an HTML email with certain tags will trigger network requests and load remote content, regardless of a configuration to block remote content

The Mozilla Foundation Security Advisory describes this flaw as: If a Thunderbird user quoted from an HTML email and the email contained either a video tag with the poster attribute or an object tag with a data attribute, a network request to the referenced remote URL was performed regardless of ...

Mozilla: Quoting from an HTML email with certain tags will trigger network requests and load remote content, regardless of a configuration to block remote content

The Mozilla Foundation Security Advisory describes this flaw as: If a Thunderbird user quoted from an HTML email and the email contained either a video tag with the poster attribute or an object tag with a data attribute, a network request to the referenced remote URL was performed regardless of ...