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Medium 6.5
Memory safety bugs fixed in Firefox 135.0.1
Memory safety bugs present in Firefox 135. 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 was fixed in Firefox 135.0.1.
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Medium 6.5
Potential opening of private browsing tabs in normal browsing windows
A race condition could have led to private browsing tabs being opened in normal browsing windows. This could have resulted in a potential privacy leak. This vulnerability was fixed in Firefox 135, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.
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Medium 4.3
Fullscreen notification not properly displayed
The z-order of the browser windows could be manipulated to hide the fullscreen notification. This could potentially be leveraged to perform a spoofing attack. This vulnerability was fixed in Firefox 135 and Thunderbird 135.
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Medium 6.5
Address bar spoofing on iOS using long hostnames
Long hostnames in URLs could be leveraged to obscure the actual host of the website or spoof the website address. This vulnerability was fixed in Firefox for iOS 134.
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Medium 4.3
Firefox Mobile iOS Full Address Bar Spoof Using Open in New Tab and Javascript URI
Opening Javascript links in a new tab via long-press in the Firefox iOS client could result in a malicious script spoofing the URL of the new tab. This vulnerability was fixed in Firefox for iOS 134.
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Medium 6.5CVE-2025-0242 EPSS 15%
Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 115.19, Firefox ESR 128.6, Thunderbird 115.19, and Thunderbird 128.6
Memory safety bugs present in Firefox 133, Thunderbird 133, Firefox ESR 115.18, Firefox ESR 128.5, Thunderbird 115.18, and Thunderbird 128.5. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could ha…
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Medium 5.1
Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 128.6, and Thunderbird 128.6
Memory safety bugs present in Firefox 133, Thunderbird 133, Firefox ESR 128.5, and Thunderbird 128.5. 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.…
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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 6.5
Address bar spoofing using an invalid protocol scheme on Firefox for Android
When using an invalid protocol scheme, an attacker could spoof the address bar. *Note: This issue only affected Android operating systems. Other operating systems are unaffected.* *Note: This issue is a different issue from CVE-2025-0244. This vulnerability w…
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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 5.3
Address bar spoofing using an invalid protocol scheme on Firefox for Android
When redirecting to an invalid protocol scheme, an attacker could spoof the address bar. *Note: This issue only affected Android operating systems. Other operating systems are unaffected.*. This vulnerability was fixed in Firefox 134.
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Medium 5.4
Accessing a non-secure HTTP site that uses a non-existent port may cause the SSL padlock icon in the location URL bar t…
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Medium 5.4
Under certain circumstances, navigating to a webpage would result in the address missing from the location URL bar, mak…
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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 5.7
On Android, Firefox may have inadvertently allowed viewing saved passwords without the required device PIN authenticati…
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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 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 6.5
When manipulating the selection node cache, an attacker may have been able to cause unexpected behavior, potentially le…
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Medium 6.5
A user who enables full-screen mode on a specially crafted web page could potentially be prevented from exiting full sc…
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Medium 5.3
A specially crafted filename containing a large number of spaces could obscure the file's extension when displayed in t…
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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 6.1
Under certain conditions, an attacker with the ability to redirect users to a malicious site via an open redirect on a …
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Medium 4.3
Multiple prompts and panels from both Firefox and the Android OS could be used to obscure the notification announcing t…
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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 6.1
The contextual menu for links could provide an opportunity for cross-site scripting attacks This vulnerability affects …
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Medium 6.1
Long pressing on a download link could potentially provide a means for cross-site scripting This vulnerability affects …
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Medium 6.3
A select option could partially obscure security prompts. This could be used by a malicious site to trick a user into g…
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Medium 6.3
Calling `PK11_Encrypt()` in NSS using CKM_CHACHA20 and the same buffer for input and output can result in plaintext on …