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-2020-6806

CVE-2020-6806 is a memory-safety bug causing an out-of-bounds read during promise resolution that could lead to memory corruption and a potentially exploitable crash. The vulnerability affects Thunderbird < 68.6, Firefox < 74, Firefox ESR < 68.6, and Firefox ESR

CVE-2021-4140

CVE-2021-4140 is a vulnerability where crafted XSLT markup could bypass the iframe sandbox, affecting Mozilla Firefox/Thunderbird products. Connected advisories consistently describe an iframe sandbox bypass with XSLT as the issue (CVE-2021-4140) and document affected versions such as Firefox ESR...

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-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-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-2019-11730

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-2020-15664

The CVE-2020-15664 issue arises from a malicious page holding a reference to eval() from an about:blank window, allowing access to InstallTrigger and prompting users to install an extension. Affected products include Firefox < 80, Thunderbird < 78.2/68.12, Firefox ESR < 68.12/78.2, and F...

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-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-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-2019-11715

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

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-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-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-2024-5702

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-2024-6611

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-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-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-2025-0240

CVE-2025-0240 affects Mozilla Firefox and Thunderbird (Firefox < 134, Firefox ESR < 128.6, Thunderbird < 134, 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-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-2020-12406

CVE-2020-12406 involves a missing type check during unboxed objects removal in Mozilla code, leading to a crash that could be exploited to run arbitrary code. Affected products/versions from the provided documents include Thunderbird < 68.9.0, Firefox < 77, and Firefox ESR

CVE-2021-29969

Thunderbird is affected by CVE-2021-29969: when STARTTLS is used for IMAP, an attacker injecting IMAP responses before TLS completion could cause Thunderbird to display spoofed information (e.g., folders that don’t exist). Affects Thunderbird versions older than 78.12. The issue originates from n...

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-2024-9401

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-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-2019-11693

CVE-2019-11693 describes a Linux-specific buffer overflow in WebGL’s bufferdata, affecting Thunderbird and Firefox (Thunderbird <60.7, Firefox <67, ESR

CVE-2020-15683

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

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-2021-24002

CVE-2021-24002 is a vulnerability observed in Firefox before 88 and Thunderbird before 78.10 where clicking an FTP URL containing encoded newline characters (%0A, %0D) could cause the server to interpret newlines and execute arbitrary commands. Affected products include Firefox ESR < 78.10, Fi...

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-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-2024-6609

The CVE-2024-6609 entry concerns NSS memory management: when memory is nearly exhausted, an elliptic curve key that was never allocated could be freed again, potentially enabling memory corruption or related instability. Affected products cited in connected docs include Mozilla Firefox and Mozill...

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-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-2021-38508

CVE-2021-38508 is a vulnerability affecting Mozilla products where a form validity message shown in the same location as a permission prompt (e.g., geolocation) can obscure the prompt, potentially tricking users into granting permissions. Affected: Firefox < 94, Thunderbird < 91.3, and Fire...

CVE-2024-6607

CVE-2024-6607 affects Mozilla Firefox (pre-128) and Mozilla Thunderbird (pre-128). The issue allows a user flow disruption where a user can be prevented from exiting pointerlock by pressing Escape and can overlay customValidity notifications from a element over permission prompts, potentially co...

CVE-2020-26960

CVE-2020-26960 is a use-after-free vulnerability caused by reallocation during Compact() on nsTArray, affecting Firefox <83, Firefox ESR <78.5, and Thunderbird

CVE-2021-38504

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

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-2024-4777

CVE-2024-4777 concerns memory-safety bugs in Firefox 125, Firefox ESR 115.10, and Thunderbird 115.10, potentially allowing arbitrary code execution. Public sources in connected documents confirm affected products and versions: Firefox < 126, Firefox ESR < 115.11, and Thunderbird

CVE-2025-0239

CVE-2025-0239 affects Mozilla Firefox and Thunderbird components via Alt-Svc with ALPN: certificates were not properly validated when the original server redirects to an insecure site. Affected versions are Firefox < 134, Firefox ESR < 128.6, Thunderbird < 134, and Thunderbird

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

CVE-2019-11742

CVE-2019-11742 describes a same-origin policy violation enabling theft of cross-origin images via a combination of SVG filters and a element, due to an error in how cached image content is treated. Affected: Firefox versions before 69, Thunderbird before 68.1 (and before 60.9 for ESR branches), ...

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...