CVE-2016-1949 Security feature bypass in n/a

What is CVE-2016-1949?

CVE-2016-1949 is a high-severity vulnerability in Mozilla Firefox, published on 13 Feb 2016. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Mozilla Firefox before 44.0.2 does not properly restrict the interaction between Service Workers and plugins, which allows remote attackers to bypass the Same Origin Policy via a crafted web site that triggers spoofed responses to requests that use NPAPI, as demonstrated by a request for a crossdomain.xml file.

Weakness: CWE-264

Which versions are affected by CVE-2016-1949?

It affects 1 product.

Products include Mozilla Firefox.

How do I fix CVE-2016-1949?

Upgrade to a fixed version.

Is CVE-2016-1949 being exploited?

There is no known exploitation of CVE-2016-1949 in the wild and no public exploit code.

Other vulnerabilities in Mozilla Firefox

• CVE-2019-11708 Mozilla Firefox and Thunderbird Sandbox Escape Exploited Critical 10.0
• CVE-2010-3765 Mozilla Multiple Products Remote Code Execution Exploited Critical 9.8
• CVE-2022-26486 Mozilla Firefox Use-After-Free Exploited Critical 9.6
• CVE-2022-26485 Mozilla Firefox Use-After-Free Exploited High 8.8
• CVE-2019-11707 Mozilla Firefox and Thunderbird Type Confusion Exploited High 8.8

All Mozilla Firefox vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2016-1949, GHSA-gvh4-3r7j-cv8q, UBUNTU-CVE-2016-1949, USN-2893-1.