Multiple serious vulnerabilities have been found in Mozilla Firefox. Malicious users can exploit these vulnerabilities to cause denial of service, gain privileges, obtain sensitive information and spoof user interface.

Below is a complete list of vulnerabilities:

1. A heap buffer overflow vulnerability Cairo can be exploited remotely to cause denial of service;
2. An unspecified vulnerability can be exploited remotely via specially crafted URL to cause denial of service;
3. An integer overflow vulnerability can be in JavaScript can be exploited remotely to cause denial of service;
4. A buffer overflow vulnerability can be exploited remotely to cause denial of service;
5. Multiple use-after-free vulnerabilities can be exploited remotely to cause denial of service;
6. An unspecified vulnerability in WebExtentions can be exploited remotely via mozAddonManager API to gain privileges;
7. A same-origin policy bypass can be exploited remotely to obtain sensitive information;
8. Unspecified vulnerability can be exploited remotely via Mozilla Maintenance Service to gain privileges;
9. An unspecified vulnerability can be exploited remotely via select dropdown menu to spoof user interface.

Mozilla Firefox earlier than 50

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Mozilla Foundation Security Advisory 2016-89