CVE-2021-29986

CVE-2021-29986 describes a race condition in getaddrinfo that can cause memory corruption and a potentially exploitable crash on Linux. Affected products include Thunderbird and Firefox variants: Thunderbird < 78.13 and < 91, Firefox ESR < 78.13, and Firefox

CVE-2024-5691

The CVE-2024-5691 entry describes a vulnerability where an attacker could trick a sandboxed iframe using an X-Frame-Options header to present a button that, if clicked, bypasses sandbox restrictions and opens a new window. Affected products (per the provided documents) include Mozilla Firefox and...

CVE-2025-0247

CVE-2025-0247 concerns memory safety bugs in Mozilla Firefox 133 and Thunderbird 133, with impact on Firefox < 134 and Thunderbird

CVE-2019-11715

CVE-2019-11715: HTML parsing error can contribute to content XSS. Affected: Firefox ESR <60.8, Firefox <68, Thunderbird

CVE-2019-11730

CVE-2019-11730 describes a same-origin policy violation where opening a locally saved HTML file could allow file: URIs to access files in the same directory or subdirectories, enabling the Fetch API to read contents and potentially exfiltrate them. The issue affects Firefox ESR < 60.8, Firefox...

CVE-2019-9788

CVE-2019-9788 affects Mozilla Thunderbird and Firefox components via memory-safety bugs that could allow arbitrary code execution. The provided documents identify memory-corruption opportunities in Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox

CVE-2020-6814

CVE-2020-6814 refers to memory-safety bugs in Mozilla Firefox and Thunderbird (68.5 timeframe) with potential to run arbitrary code. Affected products/versions: Thunderbird < 68.6, Firefox < 74, Firefox ESR < 68.6, and Firefox ESR

CVE-2020-6825

CVE-2020-6825 is a memory-safety issue in Mozilla Firefox/Thunderbird affecting Thunderbird < 68.7.0, Firefox ESR < 68.7, and Firefox

CVE-2019-11691

CVE-2019-11691 is a use-after-free vulnerability in XMLHttpRequest (XHR) triggered by an event loop, causing the XHR main thread to be invoked after the object is freed. Affects Thunderbird versions < 60.7 and Firefox/Firefox ESR versions

CVE-2020-6831

CVE-2020-6831 is a bug described in Debian security advisories as a buffer overflow in the SCTP chunk input validation in the usrsctp library. The Debian entries explicitly tie this CVE to Firefox ESR (<68.8), Firefox (<76) and Thunderbird (

CVE-2024-4768

CVE-2024-4768 involves a bug in the interaction between popup notifications and WebAuthn that could enable a user-permission bypass in the affected Mozilla products. The concrete impact described in connected advisories applies to Firefox and Firefox ESR (and Thunderbird): an attacker could trick...

CVE-2025-1011

CVE-2025-1011 is a WebAssembly code-generation bug that could crash the affected Mozilla components and, per the connected advisories, may enable remote code execution. Public references indicate the vulnerability affects Firefox up to version 135 (and ESR 128.7) and Thunderbird up to 128.7 (and ...

CVE-2025-1020

The CVE-2025-1020 entries concern memory safety bugs in Mozilla Firefox 134 and Thunderbird 134. The connected sources confirm memory-safety issues that could lead to memory corruption, with the potential to execute arbitrary code, and apply to Firefox versions before 135 and Thunderbird versions...

CVE-2018-18505

CVE-2018-18505 concerns an IPC privilege-escalation in Mozilla products where an authentication added during IPC process creation is not applied to channels created later, enabling potential sandbox escape through IPC channels. Public advisories tie this to Thunderbird and Firefox releases prior ...

CVE-2019-9796

CVE-2019-9796 is a use-after-free in the SMIL animation controller where double registration with the refresh driver leads to a dangling pointer after the controller is removed. Affected products include Thunderbird and Firefox (Firefox ESR < 60.6, Firefox

CVE-2021-29984

CVE-2021-29984 involves instruction reordering that allowed a GC-related object misevaluation, causing memory corruption and potentially exploitable crashes in Mozilla components. Affected products include Thunderbird and Firefox ESR/Firefox releases prior to 78.13/91; the exploit would require m...

CVE-2021-29988

The CVE-2021-29988 issue is a memory safety vulnerability in Mozilla code where Firefox incorrectly treated an inline list-item as a block element, leading to an out-of-bounds read or memory corruption and a potentially exploitable crash. Affected products and versions: Thunderbird < 78.13 and...

CVE-2022-34478

Summary: CVE-2022-34478 affects Thunderbird on Windows, where the ms-msdt, search, and search-ms protocols could deliver content to Microsoft apps via prompts opened by user interaction. The underlying risk is exploitation of a prompt-based handling in these protocols that bypasses the browser. T...

CVE-2024-6611

In CVE-2024-6611, a nested iframe could trigger cross-site navigation and allow cookies with SameSite=Strict or Lax to be sent. Affected products are Mozilla Firefox and Thunderbird prior to version 128. root cause: improper handling of SameSite cookies in nested iframes; impact includes potentia...

CVE-2021-23981

CVE-2021-23981 describes a memory-safety issue in WebGL where uploading a Texture into a Pixel Buffer Object could confuse WebGL and skip binding the buffer used to unpack it, leading to an out-of-bounds read and potential information leak or crash. Affected software includes Firefox ESR < 78....

CVE-2021-23984

The CVE-2021-23984 entry describes a vulnerability in which a malicious extension could open a popup window without an address bar, allowing spoofing of a site and credential theft. Affected products include Firefox ESR < 78.9, Firefox < 87, and Thunderbird

CVE-2024-5702

The CVE-2024-5702 entry is confirmed with concrete details in connected advisories: memory corruption in the networking stack affecting Mozilla Firefox before 125, Firefox ESR before 115.12, and Thunderbird before 115.12. The root cause is memory corruption in the networking component, potentiall...

CVE-2024-6603

The CVE-2024-6603 entry describes an out-of-memory scenario where an allocation can fail but the pointer is free’d afterward, leading to memory corruption. Affected software: Firefox < 128, Firefox ESR < 115.13, Thunderbird < 115.13, and Thunderbird

CVE-2024-6614

CVE-2024-6614 impacts Mozilla Firefox and Thunderbird before version 128, where the frame iterator could loop when processing certain wasm frames, causing incorrect stack traces. The issue, confirmed in Mozilla advisories, is addressed by upgrading to the 128.* release series (Firefox 128 / Thund...

CVE-2019-9813

CVE-2019-9813 describes an IonMonkey JIT type confusion caused by incorrect handling of proto mutations, enabling potential arbitrary memory read/write. Affected products include Firefox prior to 66.0.1, Firefox ESR prior to 60.6.1, and Thunderbird prior to 60.6.1. The underlying issue is a type-...

CVE-2021-23982

CVE-2021-23982 is a concrete WebRTC-based information-disclosure vulnerability affecting Mozilla products. The connected documents confirm that a malicious webpage could probe an internal network’s hosts and services running on the user’s machine via WebRTC. Affected products/versions: Firefox ES...

CVE-2024-11692

CVE-2024-11692 describes a spoofing-related issue in Mozilla Firefox/Thunderbird where a select dropdown could be rendered over another tab, causing user confusion. The vulnerability affects Firefox versions before 133, Firefox ESR before 128.5, Thunderbird before 133, and Thunderbird before 128....

CVE-2024-5692

The CVE-2024-5692 entry affects Mozilla Firefox and Thunderbird on Windows 10, where the Save As flow could bypass filename extension restrictions by including an invalid character in the extension, enabling saving with a disallowed extension like .url. Connected Mozilla advisories (MFSA) corrobo...

CVE-2025-1017

CVE-2025-1017: Memory-safety bugs in Firefox 134/THUNDERBIRD 134 (and related ESR) with potential for arbitrary code execution. Affects Firefox <135, Firefox ESR <128.7, Thunderbird

CVE-2021-38504

The CVE-2021-38504 issue is a real vulnerability affecting Firefox < 94, Thunderbird < 91.3, and Firefox ESR

CVE-2025-0240

CVE-2025-0240 affects Mozilla Firefox and Thunderbird (Firefox < 134, Firefox ESR < 128.6, Thunderbird < 134, Thunderbird

CVE-2025-1016

CVE-2025-1016 corresponds to memory-safety bugs in Firefox 134/Thunderbird 134 (and ESR lines) that could allow arbitrary code execution. Affected: Firefox <135, Firefox ESR <115.20/128.7, Thunderbird

CVE-2019-11743

CVE-2019-11743 describes cross-origin access to unload event attributes, enabling timing-side-channel exposure of history in certain browsers. Connected docs confirm affected products and versions, with fixes noted in Thunderbird updates (e.g., Thunderbird 60.9.0) and Firefox/ESR advisories addre...

CVE-2021-29976

CVE-2021-29976 is a memory-safety issue affecting Mozilla code shared by Firefox and Thunderbird. The advisory details indicate memory-safety bugs that could be exploited to run arbitrary code, impacting Thunderbird < 78.12, Firefox ESR < 78.12, and Firefox

CVE-2024-11698

CVE-2024-11698 is a macOS-specific fullscreen lock-up in Firefox/Thunderbird when a modal dialog interrupts a fullscreen transition. Affected products are Firefox and Thunderbird desktop releases older than Firefox 133, Firefox ESR 128.5, Thunderbird 133, and Thunderbird ESR 128.5. The issue can ...

CVE-2024-4769

CVE-2024-4769 : In Firefox and Thunderbird, Web Workers handling could reveal cross-origin information by distinguishing between responses with the content-type application/javascript vs non-script types. This could lead to information disclosure across origins. Affected products are Firefox befo...

CVE-2024-9401

CVE-2024-9401 affects Firefox and Thunderbird memory-safety bugs (memory corruption) in Firefox 130, ESR 115.15, ESR 128.2, and Thunderbird 128.2; vulnerable ranges extend to Firefox < 131, ESR < 128.3, ESR < 115.16, Thunderbird < 128.3, and Thunderbird

CVE-2019-17011

CVE-2019-17011 : A race condition in DocShell antitracking can cause a use-after-free and potentially crash the process. Affected: Thunderbird < 68.3, Firefox ESR < 68.3, Firefox

CVE-2019-9800

CVE-2019-9800 is supported by multiple connected advisories indicating memory safety bugs in Mozilla products (Thunderbird 60.x, Firefox ESR 60.x, Firefox 66–67 range) that could allow arbitrary code execution. The root cause is memory safety issues leading to memory corruption; affected versions...

CVE-2020-15683

CVE-2020-15683 : Mozilla Firefox and Thunderbird memory-safety issues reported affecting Firefox ESR < 78.4, Firefox < 82, and Thunderbird

CVE-2023-6209

CVE-2023-6209 corresponds to a parsing vulnerability where relative URLs starting with three slashes and a "/../" path could override the specified host, potentially enabling security issues on affected sites. The issue is documented for Firefox and Thunderbird, with affected versions cited as Fi...

CVE-2025-1014

CVE-2025-1014 describes that a certificate length check was not properly performed when adding certificates to a store, leading to exposure where processing could rely on untrusted data. The initial entry lists affected products as Firefox < 135, Firefox ESR < 128.7, Thunderbird < 128.7,...

CVE-2019-11717

CVE-2019-11717 affects Firefox ESR <60.8, Firefox <68, and Thunderbird

CVE-2019-11746

CVE-2019-11746 is a use-after-free in video element handling that can cause a crash. Public sources in connected advisories confirm impact on Firefox versions below 69, Thunderbird <68.1 and <60.9 (and ESR branches

CVE-2020-12392

CVE-2020-12392 is a local vulnerability in Mozilla products where the “Copy as cURL” feature in DevTools network tab could improperly escape HTTP POST data, enabling potential arbitrary local file disclosure when the generated curl command is pasted and run. Affected are Firefox ESR < 68.8, Fi...

CVE-2021-29946

CVE-2021-29946 affects Firefox/Thunderbird components where ports written as an integer overflow beyond 16-bit bounds could bypass port blocking when used in the Alt-Svc header. Connected advisories show the issue is labeled as port blocking bypass (access restriction bypass) with remediation via...

CVE-2021-43537

CVE-2021-43537: An incorrect type conversion of sizes from 64-bit to 32-bit integers causes a heap buffer overflow during structured cloning, leading to memory corruption and potentially exploitable crashes. Affected: Firefox before 95 and Thunderbird before 91.4.0. Remediation: upgrade to Firefo...

CVE-2024-11696

CVE-2024-11696 describes an Unhandled Exception in Add-on Signature Verification due to how loadManifestFromFile handles invalid/unsupported extension manifests, potentially bypassing enforcement of signature validation for unrelated Firefox/Thunderbird add-ons. Affected software and versions per...

CVE-2025-1012

CVE-2025-1012 describes a race during concurrent delazification that can cause a use-after-free in Firefox and Thunderbird. Affected products include Firefox <135, Firefox ESR <115.20, Firefox ESR <128.7, Thunderbird <128.7, and Thunderbird

CVE-2019-17008

CVE-2019-17008 describes a use-after-free vulnerability that can occur during the destruction of nested workers, leading to a potentially exploitable crash. Affected products include Thunderbird < 68.3, Firefox ESR < 68.3, and Firefox