Mozilla Firefox Esr vulnerabilities

CVE-2024-9398 [MEDIUM] CWE-203 CVE-2024-9398: By checking the result of calls to `window.open` with specifically set protocol handlers, an attacke By checking the result of calls to `window.open` with specifically set protocol handlers, an attacker could determine if the application which implements that protocol handler is installed. This vulnerability affects Firefox < 131, Firefox ESR < 128.3, Thunderbird < 128.3, and Thunderbird < 131.

CVE-2026-12299 [MEDIUM] Mozilla Foundation Security Advisory 2026-58: CVE-2026-12299 Mozilla Foundation Security Advisory 2026-58 CVE: CVE-2026-12299 Product: Firefox ESR Impact: high Fixed in: Firefox ESR 140.12

CVE-2026-12330 [MEDIUM] Mozilla Foundation Security Advisory 2026-59: CVE-2026-12330 Mozilla Foundation Security Advisory 2026-59 CVE: CVE-2026-12330 Product: Firefox ESR Impact: high Fixed in: Firefox ESR 115.37

CVE-2016-9895 [MEDIUM] CWE-254 CVE-2016-9895: Event handlers on "marquee" elements were executed despite a strict Content Security Policy (CSP) th Event handlers on "marquee" elements were executed despite a strict Content Security Policy (CSP) that disallowed inline JavaScript. This vulnerability affects Firefox < 50.1, Firefox ESR < 45.6, and Thunderbird < 45.6.

CVE-2017-5466 [MEDIUM] CWE-79 CVE-2017-5466: If a page is loaded from an original site through a hyperlink and contains a redirect to a "data:tex If a page is loaded from an original site through a hyperlink and contains a redirect to a "data:text/html" URL, triggering a reload will run the reloaded "data:text/html" page with its origin set incorrectly. This allows for a cross-site scripting (XSS) attack. This vulnerability affects Thunderbird < 52.1, Firefox ESR < 52.1, and Firefox < 53.

CVE-2019-11744 [MEDIUM] CWE-79 CVE-2019-11744: Some HTML elements, such as &lt;title&gt; and &lt;textarea&gt;, can contain literal angle brackets w Some HTML elements, such as and , can contain literal angle brackets without treating them as markup. It is possible to pass a literal closing tag to .innerHTML on these elements, and subsequent content after that will be parsed as if it were outside the tag. This can lead to XSS if a site does not filter user input as strictly for these elements as

CVE-2021-43543 [MEDIUM] CWE-79 CVE-2021-43543: Documents loaded with the CSP sandbox directive could have escaped the sandbox's script restriction Documents loaded with the CSP sandbox directive could have escaped the sandbox's script restriction by embedding additional content. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.

CVE-2020-26956 [MEDIUM] CWE-79 CVE-2020-26956: In some cases, removing HTML elements during sanitization would keep existing SVG event handlers and In some cases, removing HTML elements during sanitization would keep existing SVG event handlers and therefore lead to XSS. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.

CVE-2017-5383 [MEDIUM] CWE-20 CVE-2017-5383: URLs containing certain unicode glyphs for alternative hyphens and quotes do not properly trigger pu URLs containing certain unicode glyphs for alternative hyphens and quotes do not properly trigger punycode display, allowing for domain name spoofing attacks in the location bar. This vulnerability affects Thunderbird < 45.7, Firefox ESR < 45.7, and Firefox < 51.

CVE-2019-9801 [MEDIUM] CWE-20 CVE-2019-9801: Firefox will accept any registered Program ID as an external protocol handler and offer to launch th Firefox will accept any registered Program ID as an external protocol handler and offer to launch this local application when given a matching URL on Windows operating systems. This should only happen if the program has specifically registered itself as a "URL Handler" in the Windows registry. *Note: This issue only affects Windows operating systems. O

CVE-2023-4046 [MEDIUM] CWE-770 CVE-2023-4046: In some circumstances, a stale value could have been used for a global variable in WASM JIT analysis In some circumstances, a stale value could have been used for a global variable in WASM JIT analysis. This resulted in incorrect compilation and a potentially exploitable crash in the content process. This vulnerability affects Firefox < 116, Firefox ESR < 102.14, and Firefox ESR < 115.1.

CVE-2016-5291 [MEDIUM] CWE-20 CVE-2016-5291: A same-origin policy bypass with local shortcut files to load arbitrary local content from disk. Thi A same-origin policy bypass with local shortcut files to load arbitrary local content from disk. This vulnerability affects Thunderbird < 45.5, Firefox ESR < 45.5, and Firefox < 50.

CVE-2020-12392 [MEDIUM] CWE-22 CVE-2020-12392: The 'Copy as cURL' feature of Devtools' network tab did not properly escape the HTTP POST data of a The 'Copy as cURL' feature of Devtools' network tab did not properly escape the HTTP POST data of a request, which can be controlled by the website. If a user used the 'Copy as cURL' feature and pasted the command into a terminal, it could have resulted in the disclosure of local files. This vulnerability affects Firefox ESR < 68.8, Firefox < 76, and

CVE-2022-28286 [MEDIUM] CWE-1021 CVE-2022-28286: Due to a layout change, iframe contents could have been rendered outside of its border. This could h Due to a layout change, iframe contents could have been rendered outside of its border. This could have led to user confusion or spoofing attacks. This vulnerability affects Thunderbird < 91.8, Firefox < 99, and Firefox ESR < 91.8.

CVE-2023-25730 [MEDIUM] CWE-1021 CVE-2023-25730: A background script invoking <code>requestFullscreen</code> and then blocking the main thread could A background script invoking requestFullscreen and then blocking the main thread could force the browser into fullscreen mode indefinitely, resulting in potential user confusion or spoofing attacks. This vulnerability affects Firefox < 110, Thunderbird < 102.8, and Firefox ESR < 102.8.

CVE-2023-29532 [MEDIUM] CVE-2023-29532: A local attacker can trick the Mozilla Maintenance Service into applying an unsigned update file by A local attacker can trick the Mozilla Maintenance Service into applying an unsigned update file by pointing the service at an update file on a malicious SMB server. The update file can be replaced after the signature check, before the use, because the write-lock requested by the service does not work on a SMB server. *Note: This attack requires local syste

CVE-2023-6857 [MEDIUM] CWE-362 CVE-2023-6857: When resolving a symlink, a race may occur where the buffer passed to `readlink` may actually be sma When resolving a symlink, a race may occur where the buffer passed to `readlink` may actually be smaller than necessary. *This bug only affects Firefox on Unix-based operating systems (Android, Linux, MacOS). Windows is unaffected.* This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.

CVE-2015-0822 [MEDIUM] CWE-200 CVE-2015-0822: The Form Autocompletion feature in Mozilla Firefox before 36.0, Firefox ESR 31.x before 31.5, and Th The Form Autocompletion feature in Mozilla Firefox before 36.0, Firefox ESR 31.x before 31.5, and Thunderbird before 31.5 allows remote attackers to read arbitrary files via crafted JavaScript code.

CVE-2015-2729 [MEDIUM] CWE-119 CVE-2015-2729: The AudioParamTimeline::AudioNodeInputValue function in the Web Audio implementation in Mozilla Fire The AudioParamTimeline::AudioNodeInputValue function in the Web Audio implementation in Mozilla Firefox before 39.0 and Firefox ESR 38.x before 38.1 does not properly calculate an oscillator rendering range, which allows remote attackers to obtain sensitive information from process memory or cause a denial of service (out-of-bounds read) via unspecifi

CVE-2017-7823 [MEDIUM] CWE-79 CVE-2017-7823: The content security policy (CSP) "sandbox" directive did not create a unique origin for the documen The content security policy (CSP) "sandbox" directive did not create a unique origin for the document, causing it to behave as if the "allow-same-origin" keyword were always specified. This could allow a Cross-Site Scripting (XSS) attack to be launched from unsafe content. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 5