Vendor
Mozilla
2,559 known vulnerabilities.
Products
2,559 results · Feed
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High 7.3
Fullscreen notification is not displayed when fullscreen is re-requested
The fullscreen notification is prematurely hidden when fullscreen is re-requested quickly by the user. This could have been leveraged to perform a potential spoofing attack. This vulnerability was fixed in Firefox 135 and Thunderbird 135.
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Critical 9.8
Use-after-free in XSLT
An attacker could have caused a use-after-free via crafted XSLT data, leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 135, Firefox ESR 115.20, Firefox ESR 128.7, Thunderbird 128.7, 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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Critical 9.8CVE-2025-0247 EPSS 11%
Memory safety bugs fixed in Firefox 134 and Thunderbird 134
Memory safety bugs present in Firefox 133 and Thunderbird 133. 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 Firefo…
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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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High 7.7
Memory corruption when using JavaScript Text Segmentation
When segmenting specially crafted text, segmentation would corrupt memory leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.
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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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Low 3.3
Lock screen setting bypass in Firefox Focus for Android
Under certain circumstances, a user opt-in setting that Focus should require authentication before use could have been be bypassed. This vulnerability was fixed in Firefox 134.
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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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High 8.8
Memory safety bugs present in Firefox 132, Firefox ESR 128.4, and Thunderbird 128.4. Some of these bugs showed evidence…
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Critical 9.1
`NSC_DeriveKey` inadvertently assumed that the `phKey` parameter is always non-NULL. When it was passed as NULL, a segm…
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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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Critical 9.8
A flaw in handling fullscreen transitions may have inadvertently caused the application to become stuck in fullscreen m…
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High 8.8
When handling keypress events, an attacker may have been able to trick a user into bypassing the "Open Executable File?…
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Critical 9.8
A double-free issue could have occurred in `sec_pkcs7_decoder_start_decrypt()` when handling an error path. Under speci…
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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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Critical 9.8
The executable file warning was not presented when downloading .library-ms files. *Note: This issue only affected Windo…
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High 7.5
Copying sensitive information from Private Browsing tabs on Android, such as passwords, may have inadvertently stored d…
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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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High 8.1
Malicious websites may have been able to perform user intent confirmation through tapjacking. This could have led to us…
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High 8.8
Certain WebGL operations on Apple silicon M series devices could have lead to an out-of-bounds write and memory corrupt…
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High 8.4
Prototype Pollution in convict
Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') vulnerability in Mozilla Convict. This allows an attacker to inject attributes that are used in other components, or to override existing attributes with ones that have …
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Medium 6.1
Nunjucks autoescape bypass leads to cross site scripting
In Nunjucks versions prior to version 3.2.4, it was possible to bypass the restrictions which are provided by the autoescape functionality. If there are two user-controlled parameters on the same line used in the views, it was possible to inject cross site sc…
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High 7.8CVE-2023-1521 Public exploit
Local Privilege Escalation in sccache
On Linux the sccache client can execute arbitrary code with the privileges of a local sccache server, by preloading the code in a shared library passed to LD_PRELOAD. If the server is run as root (which is the default when installing the snap package https://…
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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 4.3
A malicious website could have included an iframe with an malformed URI resulting in a non-exploitable browser crash. T…
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Critical 9.1
Focus was incorrectly allowing internal links to utilize the app scheme used for deeplinking, which could result in lin…