Mozilla Firefox Esr vulnerabilities

CVE-2020-15669 [HIGH] CWE-416 CVE-2020-15669: When aborting an operation, such as a fetch, an abort signal may be deleted while alerting the objec When aborting an operation, such as a fetch, an abort signal may be deleted while alerting the objects to be notified. This results in a use-after-free and we presume that with enough effort it could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 68.12 and Thunderbird < 68.12.

CVE-2023-6208 [HIGH] CVE-2023-6208: When using X11, text selected by the page using the Selection API was erroneously copied into the pr When using X11, text selected by the page using the Selection API was erroneously copied into the primary selection, a temporary storage not unlike the clipboard. *This bug only affects Firefox on X11. Other systems are unaffected.* This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.

CVE-2022-26381 [HIGH] CWE-416 CVE-2022-26381: An attacker could have caused a use-after-free by forcing a text reflow in an SVG object leading to An attacker could have caused a use-after-free by forcing a text reflow in an SVG object leading to a potentially exploitable crash. This vulnerability affects Firefox < 98, Firefox ESR < 91.7, and Thunderbird < 91.7.

CVE-2023-37201 [HIGH] CWE-416 CVE-2023-37201: An attacker could have triggered a use-after-free condition when creating a WebRTC connection over H An attacker could have triggered a use-after-free condition when creating a WebRTC connection over HTTPS. This vulnerability affects Firefox < 115, Firefox ESR < 102.13, and Thunderbird < 102.13.

CVE-2024-0755 [HIGH] CWE-94 CVE-2024-0755: Memory safety bugs present in Firefox 121, Firefox ESR 115.6, and Thunderbird 115.6. Some of these b Memory safety bugs present in Firefox 121, Firefox ESR 115.6, and Thunderbird 115.6. 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 < 122, Firefox ESR < 115.7, and Thunderbird < 115.7.

CVE-2022-31739 [HIGH] CWE-73 CVE-2022-31739: When downloading files on Windows, the % character was not escaped, which could have lead to a downl When downloading files on Windows, the % character was not escaped, which could have lead to a download incorrectly being saved to attacker-influenced paths that used variables such as %HOMEPATH% or %APPDATA%.*This bug only affects Firefox for Windows. Other operating systems are unaffected.*. This vulnerability affects Thunderbird < 91.10, Firefox < 1

CVE-2023-25729 [HIGH] CWE-863 CVE-2023-25729: Permission prompts for opening external schemes were only shown for <code>ContentPrincipals</code> r Permission prompts for opening external schemes were only shown for ContentPrincipals resulting in extensions being able to open them without user interaction via ExpandedPrincipals. This could lead to further malicious actions such as downloading files or interacting with software already installed on the system. This vulnerability affects Firefox <

CVE-2023-3600 [HIGH] CWE-416 CVE-2023-3600: During the worker lifecycle, a use-after-free condition could have occurred, which could have led to During the worker lifecycle, a use-after-free condition could have occurred, which could have led to a potentially exploitable crash. This vulnerability affects Firefox < 115.0.2, Firefox ESR < 115.0.2, and Thunderbird < 115.0.1.

CVE-2024-7528 [HIGH] CWE-416 CVE-2024-7528: Incorrect garbage collection interaction in IndexedDB could have led to a use-after-free. This vulne Incorrect garbage collection interaction in IndexedDB could have led to a use-after-free. This vulnerability affects Firefox < 129, Firefox ESR < 128.1, and Thunderbird < 128.1.

CVE-2018-5188 [CRITICAL] CWE-119 CVE-2018-5188: Memory safety bugs present in Firefox 60, Firefox ESR 60, and Firefox ESR 52.8. Some of these bugs s Memory safety bugs present in Firefox 60, Firefox ESR 60, and Firefox ESR 52.8. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Thunderbird < 60, Thunderbird < 52.9, Firefox ESR < 60.1, Firefox ESR < 52.9, and Firefo

CVE-2023-4576 [HIGH] CWE-190 CVE-2023-4576: On Windows, an integer overflow could occur in `RecordedSourceSurfaceCreation` which resulted in a h On Windows, an integer overflow could occur in `RecordedSourceSurfaceCreation` which resulted in a heap buffer overflow potentially leaking sensitive data that could have led to a sandbox escape. *This bug only affects Firefox on Windows. Other operating systems are unaffected.* This vulnerability affects Firefox < 117, Firefox ESR < 102.15, Firefox ESR

CVE-2018-5156 [CRITICAL] CWE-20 CVE-2018-5156: A vulnerability can occur when capturing a media stream when the media source type is changed as the A vulnerability can occur when capturing a media stream when the media source type is changed as the capture is occurring. This can result in stream data being cast to the wrong type causing a potentially exploitable crash. This vulnerability affects Thunderbird < 60, Firefox ESR < 60.1, Firefox ESR < 52.9, and Firefox < 61.

CVE-2026-92054 [HIGH] Mozilla Foundation Security Advisory 2026-93: CVE-2026-92054 Mozilla Foundation Security Advisory 2026-93 CVE: CVE-2026-92054 Product: Firefox ESR Impact: low Fixed in: Firefox ESR 153.3

CVE-2026-100814 [HIGH] Mozilla Foundation Security Advisory 2026-100: CVE-2026-100814 Mozilla Foundation Security Advisory 2026-100 CVE: CVE-2026-100814 Product: Firefox ESR Impact: low Fixed in: Firefox ESR 153.4

CVE-2026-92052 [HIGH] Mozilla Foundation Security Advisory 2026-93: CVE-2026-92052 Mozilla Foundation Security Advisory 2026-93 CVE: CVE-2026-92052 Product: Firefox ESR Impact: low Fixed in: Firefox ESR 153.3

CVE-2026-92043 [HIGH] Mozilla Foundation Security Advisory 2026-93: CVE-2026-92043 Mozilla Foundation Security Advisory 2026-93 CVE: CVE-2026-92043 Product: Firefox ESR Impact: low Fixed in: Firefox ESR 153.3

CVE-2026-92062 [HIGH] Mozilla Foundation Security Advisory 2026-93: CVE-2026-92062 Mozilla Foundation Security Advisory 2026-93 CVE: CVE-2026-92062 Product: Firefox ESR Impact: low Fixed in: Firefox ESR 153.3

CVE-2014-1567 [CRITICAL] CVE-2014-1567: Use-after-free vulnerability in DirectionalityUtils.cpp in Mozilla Firefox before 32.0, Firefox ESR Use-after-free vulnerability in DirectionalityUtils.cpp in Mozilla Firefox before 32.0, Firefox ESR 24.x before 24.8 and 31.x before 31.1, and Thunderbird 24.x before 24.8 and 31.x before 31.1 allows remote attackers to execute arbitrary code via text that is improperly handled during the interaction between directionality resolution and layout.

CVE-2017-5438 [CRITICAL] CWE-416 CVE-2017-5438: A use-after-free vulnerability during XSLT processing due to the result handler being held by a free A use-after-free vulnerability during XSLT processing due to the result handler being held by a freed handler during handling. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 52.1, Firefox ESR < 45.9, Firefox ESR < 52.1, and Firefox < 53.

CVE-2018-12392 [CRITICAL] CVE-2018-12392: When manipulating user events in nested loops while opening a document through script, it is possibl When manipulating user events in nested loops while opening a document through script, it is possible to trigger a potentially exploitable crash due to poor event handling. This vulnerability affects Firefox < 63, Firefox ESR < 60.3, and Thunderbird < 60.3.