Vulnerabilities (CVE)

Filtered by vendor Mozilla Subscribe
Total 3055 CVE
CVE Vendors Products Updated CVSS v2 CVSS v3
CVE-2021-4129 1 Mozilla 3 Firefox, Firefox Esr, Thunderbird 2024-11-21 N/A 9.8 CRITICAL
Mozilla developers and community members Julian Hector, Randell Jesup, Gabriele Svelto, Tyson Smith, Christian Holler, and Masayuki Nakano reported memory safety bugs present in Firefox 94. 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 affects Firefox < 95, Firefox ESR < 91.4.0, and Thunderbird < 91.4.0.
CVE-2021-4128 2 Apple, Mozilla 2 Macos, Firefox 2024-11-21 N/A 6.5 MEDIUM
When transitioning in and out of fullscreen mode, a graphics object was not correctly protected; resulting in memory corruption and a potentially exploitable crash.<br>*This bug only affects Firefox on MacOS. Other operating systems are unaffected.*. This vulnerability affects Firefox < 95.
CVE-2021-4127 1 Mozilla 2 Firefox Esr, Thunderbird 2024-11-21 N/A 9.8 CRITICAL
An out of date graphics library (Angle) likely contained vulnerabilities that could potentially be exploited. This vulnerability affects Thunderbird < 78.9 and Firefox ESR < 78.9.
CVE-2021-4126 1 Mozilla 1 Thunderbird 2024-11-21 N/A 6.5 MEDIUM
When receiving an OpenPGP/MIME signed email message that contains an additional outer MIME message layer, for example a message footer added by a mailing list gateway, Thunderbird only considered the inner signed message for the signature validity. This gave the false impression that the additional contents were also covered by the digital signature. Starting with Thunderbird version 91.4.1, only the signature that belongs to the top level MIME part will be considered for the displayed status. This vulnerability affects Thunderbird < 91.4.1.
CVE-2021-43546 2 Debian, Mozilla 4 Debian Linux, Firefox, Firefox Esr and 1 more 2024-11-21 4.3 MEDIUM 4.3 MEDIUM
It was possible to recreate previous cursor spoofing attacks against users with a zoomed native cursor. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.
CVE-2021-43545 2 Debian, Mozilla 4 Debian Linux, Firefox, Firefox Esr and 1 more 2024-11-21 4.3 MEDIUM 6.5 MEDIUM
Using the Location API in a loop could have caused severe application hangs and crashes. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.
CVE-2021-43544 2 Google, Mozilla 2 Android, Firefox 2024-11-21 4.3 MEDIUM 6.1 MEDIUM
When receiving a URL through a SEND intent, Firefox would have searched for the text, but subsequent usages of the address bar might have caused the URL to load unintentionally, which could lead to XSS and spoofing attacks. *This bug only affects Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox < 95.
CVE-2021-43543 2 Debian, Mozilla 4 Debian Linux, Firefox, Firefox Esr and 1 more 2024-11-21 4.3 MEDIUM 6.1 MEDIUM
Documents loaded with the CSP sandbox directive could have escaped the sandbox's script restriction by embedding additional content. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.
CVE-2021-43542 2 Debian, Mozilla 4 Debian Linux, Firefox, Firefox Esr and 1 more 2024-11-21 4.3 MEDIUM 6.5 MEDIUM
Using XMLHttpRequest, an attacker could have identified installed applications by probing error messages for loading external protocols. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.
CVE-2021-43541 2 Debian, Mozilla 4 Debian Linux, Firefox, Firefox Esr and 1 more 2024-11-21 4.3 MEDIUM 6.5 MEDIUM
When invoking protocol handlers for external protocols, a supplied parameter URL containing spaces was not properly escaped. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.
CVE-2021-43540 1 Mozilla 1 Firefox 2024-11-21 4.3 MEDIUM 6.5 MEDIUM
WebExtensions with the correct permissions were able to create and install ServiceWorkers for third-party websites that would not have been uninstalled with the extension. This vulnerability affects Firefox < 95.
CVE-2021-43539 2 Debian, Mozilla 4 Debian Linux, Firefox, Firefox Esr and 1 more 2024-11-21 6.8 MEDIUM 8.8 HIGH
Failure to correctly record the location of live pointers across wasm instance calls resulted in a GC occurring within the call not tracing those live pointers. This could have led to a use-after-free causing a potentially exploitable crash. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.
CVE-2021-43538 2 Debian, Mozilla 4 Debian Linux, Firefox, Firefox Esr and 1 more 2024-11-21 4.3 MEDIUM 4.3 MEDIUM
By misusing a race in our notification code, an attacker could have forcefully hidden the notification for pages that had received full screen and pointer lock access, which could have been used for spoofing attacks. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.
CVE-2021-43537 2 Debian, Mozilla 4 Debian Linux, Firefox, Firefox Esr and 1 more 2024-11-21 6.8 MEDIUM 8.8 HIGH
An incorrect type conversion of sizes from 64bit to 32bit integers allowed an attacker to corrupt memory leading to a potentially exploitable crash. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.
CVE-2021-43536 2 Debian, Mozilla 4 Debian Linux, Firefox, Firefox Esr and 1 more 2024-11-21 4.3 MEDIUM 6.5 MEDIUM
Under certain circumstances, asynchronous functions could have caused a navigation to fail but expose the target URL. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.
CVE-2021-43535 2 Debian, Mozilla 4 Debian Linux, Firefox, Firefox Esr and 1 more 2024-11-21 6.8 MEDIUM 8.8 HIGH
A use-after-free could have occured when an HTTP2 session object was released on a different thread, leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 93, Thunderbird < 91.3, and Firefox ESR < 91.3.
CVE-2021-43534 2 Debian, Mozilla 4 Debian Linux, Firefox, Firefox Esr and 1 more 2024-11-21 6.8 MEDIUM 8.8 HIGH
Mozilla developers and community members reported memory safety bugs present in Firefox 93 and Firefox ESR 91.2. 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 affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.
CVE-2021-43533 1 Mozilla 1 Firefox 2024-11-21 4.3 MEDIUM 4.3 MEDIUM
When parsing internationalized domain names, high bits of the characters in the URLs were sometimes stripped, resulting in inconsistencies that could lead to user confusion or attacks such as phishing. This vulnerability affects Firefox < 94.
CVE-2021-43532 1 Mozilla 1 Firefox 2024-11-21 5.8 MEDIUM 6.1 MEDIUM
The 'Copy Image Link' context menu action would copy the final image URL after redirects. By embedding an image that triggered authentication flows - in conjunction with a Content Security Policy that stopped a redirection chain in the middle - the final image URL could be one that contained an authentication token used to takeover a user account. If a website tricked a user into copy and pasting the image link back to the page, the page would be able to steal the authentication tokens. This was fixed by making the action return the original URL, before any redirects. This vulnerability affects Firefox < 94.
CVE-2021-43531 1 Mozilla 1 Firefox 2024-11-21 4.3 MEDIUM 4.3 MEDIUM
When a user loaded a Web Extensions context menu, the Web Extension could access the post-redirect URL of the element clicked. If the Web Extension lacked the WebRequest permission for the hosts involved in the redirect, this would be a same-origin-violation leaking data the Web Extension should have access to. This was fixed to provide the pre-redirect URL. This is related to CVE-2021-43532 but in the context of Web Extensions. This vulnerability affects Firefox < 94.