Mozilla Firefox vulnerabilities

CVE-2020-15647 [HIGH] CWE-200 CVE-2020-15647: A Content Provider in Firefox for Android allowed local files accessible by the browser to be read b A Content Provider in Firefox for Android allowed local files accessible by the browser to be read by a remote webpage, leading to sensitive data disclosure, including cookies for other origins. This vulnerability affects Firefox for < Android.

CVE-2009-1840 [CRITICAL] CWE-264 CVE-2009-1840: Mozilla Firefox before 3.0.11, Thunderbird, and SeaMonkey do not check content policy before loading Mozilla Firefox before 3.0.11, Thunderbird, and SeaMonkey do not check content policy before loading a script file into a XUL document, which allows remote attackers to bypass intended access restrictions via a crafted HTML document, as demonstrated by a "web bug" in an e-mail message, or web script or an advertisement in a web page.

CVE-2012-3978 [MEDIUM] CWE-264 CVE-2012-3978: The nsLocation::CheckURL function in Mozilla Firefox before 15.0, Firefox ESR 10.x before 10.0.7, Th The nsLocation::CheckURL function in Mozilla Firefox before 15.0, Firefox ESR 10.x before 10.0.7, Thunderbird before 15.0, Thunderbird ESR 10.x before 10.0.7, and SeaMonkey before 2.12 does not properly follow the security model of the location object, which allows remote attackers to bypass intended content-loading restrictions or possibly have unspe

CVE-2020-12418 [MEDIUM] CWE-125 CVE-2020-12418: Manipulating individual parts of a URL object could have caused an out-of-bounds read, leaking proce Manipulating individual parts of a URL object could have caused an out-of-bounds read, leaking process memory to malicious JavaScript. This vulnerability affects Firefox ESR < 68.10, Firefox < 78, and Thunderbird < 68.10.0.

CVE-2009-3983 [MEDIUM] CVE-2009-3983: Mozilla Firefox before 3.0.16 and 3.5.x before 3.5.6, and SeaMonkey before 2.0.1, allows remote atta Mozilla Firefox before 3.0.16 and 3.5.x before 3.5.6, and SeaMonkey before 2.0.1, allows remote attackers to send authenticated requests to arbitrary applications by replaying the NTLM credentials of a browser user.

CVE-2006-3113 [HIGH] CVE-2006-3113: Mozilla Firefox 1.5 before 1.5.0.5, Thunderbird before 1.5.0.5, and SeaMonkey before 1.0.3 allows re Mozilla Firefox 1.5 before 1.5.0.5, Thunderbird before 1.5.0.5, and SeaMonkey before 1.0.3 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via simultaneous XPCOM events, which causes a timer object to be deleted in a way that triggers memory corruption.

CVE-2014-1526 [MEDIUM] CWE-269 CVE-2014-1526: The XrayWrapper implementation in Mozilla Firefox before 29.0 and SeaMonkey before 2.26 allows user- The XrayWrapper implementation in Mozilla Firefox before 29.0 and SeaMonkey before 2.26 allows user-assisted remote attackers to bypass intended access restrictions via a crafted web site that is visited in the debugger, leading to unwrapping operations and calls to DOM methods on the unwrapped objects.

CVE-2010-1215 [MEDIUM] CWE-94 CVE-2010-1215: Mozilla Firefox 3.6.x before 3.6.7 and Thunderbird 3.1.x before 3.1.1 do not properly implement acce Mozilla Firefox 3.6.x before 3.6.7 and Thunderbird 3.1.x before 3.1.1 do not properly implement access to a content object through a SafeJSObjectWrapper (aka SJOW) wrapper, which allows remote attackers to execute arbitrary JavaScript code with chrome privileges by leveraging "access to an object from the chrome scope."

CVE-2026-16404 Mozilla Foundation Security Advisory 2026-68: CVE-2026-16404 Mozilla Foundation Security Advisory 2026-68 CVE: CVE-2026-16404 Product: Firefox Impact: high Fixed in: Firefox 153

CVE-2022-42930 [HIGH] CWE-362 CVE-2022-42930: If two Workers were simultaneously initializing their CacheStorage, a data race could have occurred If two Workers were simultaneously initializing their CacheStorage, a data race could have occurred in the `ThirdPartyUtil` component. This vulnerability affects Firefox < 106.

CVE-2025-1940 [HIGH] CWE-1021 CVE-2025-1940: A select option could partially obscure the confirmation prompt shown before launching external apps A select option could partially obscure the confirmation prompt shown before launching external apps. This could be used to trick a user in to launching an external app unexpectedly. *This issue only affects Android versions of Firefox.*. This vulnerability was fixed in Firefox 136.

CVE-2017-7844 [MEDIUM] CWE-200 CVE-2017-7844: A combination of an external SVG image referenced on a page and the coloring of anchor links stored A combination of an external SVG image referenced on a page and the coloring of anchor links stored within this image can be used to determine which pages a user has in their history. This can allow a malicious website to query user history. Note: This issue only affects Firefox 57. Earlier releases are not affected. This vulnerability affects Firefox

CVE-2021-43541 [MEDIUM] CVE-2021-43541: When invoking protocol handlers for external protocols, a supplied parameter URL containing spaces w When invoking protocol handlers for external protocols, a supplied parameter URL containing spaces was not properly escaped. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.

CVE-2024-5700 [HIGH] CWE-786 CVE-2024-5700: Memory safety bugs present in Firefox 126, Firefox ESR 115.11, and Thunderbird 115.11. Some of these Memory safety bugs present in Firefox 126, Firefox ESR 115.11, and Thunderbird 115.11. 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 affects Firefox < 127, Firefox ESR < 115.12, and Thunderbird < 115.12.

CVE-2018-5152 [MEDIUM] CWE-327 CVE-2018-5152: WebExtensions with the appropriate permissions can attach content scripts to Mozilla sites such as a WebExtensions with the appropriate permissions can attach content scripts to Mozilla sites such as accounts.firefox.com and listen to network traffic to the site through the "webRequest" API. For example, this allows for the interception of username and an encrypted password during login to Firefox Accounts. This issue does not expose synchronization

CVE-2006-0294 [HIGH] CVE-2006-0294: Mozilla Firefox before 1.5.0.1, Thunderbird 1.5 if running Javascript in mail, and SeaMonkey before Mozilla Firefox before 1.5.0.1, Thunderbird 1.5 if running Javascript in mail, and SeaMonkey before 1.0 allow remote attackers to execute arbitrary code by changing an element's style from position:relative to position:static, which causes Gecko to operate on freed memory.

CVE-2015-7575 [MEDIUM] CWE-19 CVE-2015-7575: Mozilla Network Security Services (NSS) before 3.20.2, as used in Mozilla Firefox before 43.0.2 and Mozilla Network Security Services (NSS) before 3.20.2, as used in Mozilla Firefox before 43.0.2 and Firefox ESR 38.x before 38.5.2, does not reject MD5 signatures in Server Key Exchange messages in TLS 1.2 Handshake Protocol traffic, which makes it easier for man-in-the-middle attackers to spoof servers by triggering a collision.

CVE-2019-11725 [MEDIUM] CVE-2019-11725: When a user navigates to site marked as unsafe by the Safebrowsing API, warning messages are display When a user navigates to site marked as unsafe by the Safebrowsing API, warning messages are displayed and navigation is interrupted but resources from the same site loaded through websockets are not blocked, leading to the loading of unsafe resources and bypassing safebrowsing protections. This vulnerability affects Firefox < 68.

CVE-2023-5169 [MEDIUM] CWE-787 CVE-2023-5169: A compromised content process could have provided malicious data in a `PathRecording` resulting in a A compromised content process could have provided malicious data in a `PathRecording` resulting in an out-of-bounds write, leading to a potentially exploitable crash in a privileged process. This vulnerability affects Firefox < 118, Firefox ESR < 115.3, and Thunderbird < 115.3.

CVE-2023-6865 [MEDIUM] CVE-2023-6865: `EncryptingOutputStream` was susceptible to exposing uninitialized data. This issue could only be a `EncryptingOutputStream` was susceptible to exposing uninitialized data. This issue could only be abused in order to write data to a local disk which may have implications for private browsing mode. This vulnerability affects Firefox ESR < 115.6 and Firefox < 121.