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Medium 5.3
Use-after-free when breaking lines in text
Assuming a controlled failed memory allocation, an attacker could have caused a use-after-free, leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Firefox ESR 115.19, Thunderbird 134, and Thunderbird 12…
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Medium 4.0
Alt-Svc ALPN validation failure when redirected
When using Alt-Svc, ALPN did not properly validate certificates when the original server is redirecting to an insecure site. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.
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Medium 4.0
Compartment mismatch when parsing JavaScript JSON module
Parsing a JavaScript module as JSON could, under some circumstances, cause cross-compartment access, which may result in a use-after-free. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.
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Medium 5.4
WebChannel APIs susceptible to confused deputy attack
The WebChannel API, which is used to transport various information across processes, did not check the sending principal but rather accepted the principal being sent. This could have led to privilege escalation attacks. This vulnerability was fixed in Firefox…
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Medium 6.5
Missing thread synchronization primitives could have led to a data race on members of the PlaybackParams structure. Thi…
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Medium 6.5
A null pointer dereference may have inadvertently occurred in `pk12util`, and specifically in the `SEC_ASN1DecodeItem_U…
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Medium 5.4
The application failed to account for exceptions thrown by the `loadManifestFromFile` method during add-on signature ve…
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Medium 5.4
A crafted URL containing Arabic script and whitespace characters could have hidden the true origin of the page, resulti…
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Medium 6.1
Enhanced Tracking Protection's Strict mode may have inadvertently allowed a CSP `frame-src` bypass and DOM-based XSS th…
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Medium 4.3
The incorrect domain may have been displayed in the address bar during an interrupted navigation attempt. This could ha…
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Medium 4.3
An attacker could cause a select dropdown to be shown over another tab; this could have led to user confusion and possi…
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Medium 5.3
Using remote content in OpenPGP encrypted messages can lead to the disclosure of plaintext. This vulnerability affects …
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Medium 6.1
In multipart/x-mixed-replace responses, `Content-Disposition: attachment` in the response header was not respected and …
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Medium 5.4
The origin of an external protocol handler prompt could have been obscured using a data: URL within an `iframe`. This v…
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Medium 6.5
An attacker could have caused a use-after-free when accessibility was enabled, leading to a potentially exploitable cra…
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Medium 6.5
A permission leak could have occurred from a trusted site to an untrusted site via `embed` or `object` elements. This v…
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Medium 6.1
A missing delay in directory upload UI could have made it possible for an attacker to trick a user into granting permis…
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Medium 5.3
By checking the result of calls to `window.open` with specifically set protocol handlers, an attacker could determine i…
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Medium 6.1
An attacker could, via a specially crafted multipart response, execute arbitrary JavaScript under the `resource://devto…
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Medium 6.5
When aborting the verification of an OTR chat session, an attacker could have caused a use-after-free bug leading to a …
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Medium 6.1
If a site had been granted the permission to open popup windows, it could cause Select elements to appear on top of ano…
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Medium 6.5
Select options could obscure the fullscreen notification dialog. This could be used by a malicious site to perform a sp…
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Medium 5.5
Incorrect listing of stack frames
The frame iterator could get stuck in a loop when encountering certain wasm frames leading to incorrect stack traces. This vulnerability affects Firefox < 128 and Thunderbird < 128.
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Medium 5.3
CSP violation leakage when using devtools
CSP violations generated links in the console tab of the developer tools, pointing to the violating resource. This caused a DNS prefetch which leaked that a CSP violation happened. This vulnerability affects Firefox < 128 and Thunderbird < 128.
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Medium 4.3
Incorrect listing of stack frames
The frame iterator could get stuck in a loop when encountering certain wasm frames leading to incorrect stack traces. This vulnerability affects Firefox < 128 and Thunderbird < 128.
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Medium 6.3
Form validation popups could block exiting full-screen mode
Form validation popups could capture escape key presses. Therefore, spamming form validation messages could be used to prevent users from exiting full-screen mode. This vulnerability affects Firefox < 128 and Thunderbird < 128.
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Medium 4.3
Cursor could be moved out of the viewport using pointerlock.
It was possible to move the cursor using pointerlock from an iframe. This allowed moving the cursor outside of the viewport and the Firefox window. This vulnerability affects Firefox < 128 and Thunderbird < 128.
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Medium 4.7
Race condition in permission assignment
A race condition could lead to a cross-origin container obtaining permissions of the top-level origin. This vulnerability affects Firefox < 128, Firefox ESR < 115.13, Thunderbird < 115.13, and Thunderbird < 128.
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Medium 6.3
Memory corruption in WebGL API
Due to large allocation checks in Angle for GLSL shaders being too lenient an out-of-bounds access could occur when allocating more than 8192 ints in private shader memory on macOS. This vulnerability affects Firefox < 128, Firefox ESR < 115.13, Thunderbird <…
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Medium 4.7
By tricking the browser with a `X-Frame-Options` header, a sandboxed iframe could have presented a button that, if clic…
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Medium 6.5
On Windows 10, when using the 'Save As' functionality, an attacker could have tricked the browser into saving the file …
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Medium 6.1
Offscreen Canvas did not properly track cross-origin tainting, which could be used to access image data from another si…
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Medium 4.3
By monitoring the time certain operations take, an attacker could have guessed which external protocol handlers were fu…
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Medium 5.9
When importing resources using Web Workers, error messages would distinguish the difference between `application/javasc…
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Medium 6.1
A bug in popup notifications' interaction with WebAuthn made it easier for an attacker to trick a user into granting pe…
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Medium 5.6
PDF.js vulnerable to arbitrary JavaScript execution upon opening a malicious PDF
A type check was missing when handling fonts in PDF.js, which would allow arbitrary JavaScript execution in the PDF.js context. This vulnerability affects Firefox < 126, Firefox ESR < 115.11, and Thunderbird < 115.11.
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Medium 4.3
If the `browser.privatebrowsing.autostart` preference is enabled, IndexedDB files were not properly deleted when the wi…
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Medium 4.0
If an AlignedBuffer were assigned to itself, the subsequent self-move could result in an incorrect reference count and …
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Medium 5.9
On 32-bit versions there were integer-overflows that led to an out-of-bounds-read that potentially could be triggered b…
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Medium 5.5
A missing delay on when pointer lock was used could have allowed a malicious page to trick a user into granting permiss…