Уязвимость компонента HTTP Header Handler браузеров Mozilla Firefox, Firefox ESR, позволяющая нарушителю проводить межсайтовые сценарные атаки (XSS)

Уязвимость браузера Mozilla Firefox и почтового клиента Thunderbird, связанная с выходом операции за границы буфера в памяти, позволяющая нарушителю выполнить произвольный код

Уязвимость режима HTTPS-Only Mode браузера Mozilla Firefox, позволяющая нарушителю провести атаку типа clickjacking («захват клика»)

Уязвимость реализации протокола TLS браузера Mozilla Firefox, позволяющая нарушителю обойти существующие ограничения безопасности и получить несанкционированный доступ к защищаемой информации

Уязвимость браузера Mozilla Firefox операционных систем Android, связанная с использованием открытой переадресации, позволяющая нарушителю проводить фишинг-атаки

Уязвимость механизма Content Security Policy (CSP) браузера Mozilla Firefox, позволяющая нарушителю обойти ограничения безопасности и получить несанкционированный доступ к защищаемой информации

Уязвимость интерфейса FontFaceSet браузеров Mozilla Firefox, Firefox ESR, позволяющая нарушителю вызвать отказ в обслуживании

Уязвимость расширения WebCompat браузеров Mozilla Firefox, Firefox ESR, позволяющая нарушителю раскрыть защищаемую информацию

Уязвимость браузеров Mozilla Firefox, Firefox ESR операционных систем macOS, связанная с недостаточной проверкой подлинности данных, позволяющая нарушителю оказать воздействие на конфиденциальность, целостность и доступность защищаемой информации

Уязвимость браузеров Mozilla Firefox, Firefox ESR, связанная с неправильным кодированием или экранированием выходных данных, позволяющая нарушителю обойти существующие ограничения безопасности и перенаправить пользователя на другой веб-сайт

Уязвимость функции Multi-Account Container браузера Mozilla Firefox, позволяющая нарушителю обойти существующие ограничения безопасности прокси-сервера SOCKS и раскрыть защищаемую информацию

Уязвимость компонента File Extension Handler браузера Mozilla Firefox, позволяющая нарушителю загрузить произвольный файл

Уязвимость компонента Link Handler браузера Mozilla Firefox, позволяющая нарушителю обойти существующие ограничения безопасности

A use-after-free in FontFaceSet resulted in a potentially exploitable crash. This vulnerability was fixed in Firefox 140, Firefox ESR 115.25, Firefox ESR 128.12, Thunderbird 140, and Thunderbird 128.12.

An attacker who enumerated resources from the WebCompat extension could have obtained a persistent UUID that identified the browser, and persisted between containers and normal/private browsing mode, but not profiles. This vulnerability was fixed in Firefox 140, Firefox ESR 115.25, Firefox ESR 128.12, Thunderbird 140, and Thunderbird 128.12.

The executable file warning did not warn users before opening files with the `terminal` extension. *This bug only affects Firefox for macOS. Other versions of Firefox are unaffected.*. This vulnerability was fixed in Firefox 140, Firefox ESR 128.12, Thunderbird 140, and Thunderbird 128.12.

An attacker was able to bypass the `connect-src` directive of a Content Security Policy by manipulating subdocuments. This would have also hidden the connections from the Network tab in Devtools. This vulnerability was fixed in Firefox 140 and Thunderbird 140.

When a URL was provided in a link querystring parameter, Firefox for Android would follow that URL instead of the correct URL, potentially leading to phishing attacks. *This bug only affects Firefox for Android. Other versions of Firefox are unaffected.*. This vulnerability was fixed in Firefox 140.

Firefox could have incorrectly parsed a URL and rewritten it to the youtube.com domain when parsing the URL specified in an `embed` tag. This could have bypassed website security checks that restricted which domains users were allowed to embed. This vulnerability was fixed in Firefox 140, Firefox ESR 128.12, Thunderbird 140, and Thunderbird 128.12.

When a file download is specified via the `Content-Disposition` header, that directive would be ignored if the file was included via a `<embed>` or `<object>` tag, potentially making a website vulnerable to a cross-site scripting attack. This vulnerability was fixed in Firefox 140, Firefox ESR 128.12, Thunderbird 140, and Thunderbird 128.12.

When a link can be opened in an external application, Firefox for Android will, by default, prompt the user before doing so. An attacker could have bypassed this prompt, potentially exposing the user to security vulnerabilities or privacy leaks in external applications. *This bug only affects Firefox for Android. Other versions of Firefox are unaffected.*. This vulnerability was fixed in Firefox 140.

When Multi-Account Containers was enabled, DNS requests could have bypassed a SOCKS proxy when the domain name was invalid or the SOCKS proxy was not responding. This vulnerability was fixed in Firefox 140 and Thunderbird 140.

If a user visited a webpage with an invalid TLS certificate, and granted an exception, the webpage was able to provide a WebAuthn challenge that the user would be prompted to complete. This is in violation of the WebAuthN spec which requires "a secure transport established without errors". This vulnerability was fixed in Firefox 140 and Thunderbird 140.

The exception page for the HTTPS-Only feature, displayed when a website is opened via HTTP, lacked an anti-clickjacking delay, potentially allowing an attacker to trick a user into granting an exception and loading a webpage over HTTP. This vulnerability was fixed in Firefox 140 and Thunderbird 140.

If a user saved a response from the Network tab in Devtools using the Save As context menu option, that file may not have been saved with the `.download` file extension. This could have led to the user inadvertently running a malicious executable. This vulnerability was fixed in Firefox 140 and Thunderbird 140.

Memory safety bugs present in Firefox 139 and Thunderbird 139. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 140 and Thunderbird 140.