CVE-2016-1949

8.8 highEPSS 1.5%

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.

Severity

CVSS 3.0

8.8 high

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS: 1.5% chance of exploitation in the next 30 days; higher than 74% of CVEs (scores of 2026-10-31)
CWE: CWE-264
Published: 2016-02-13
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

mozilla:firefox

References

http://lists.opensuse.org/opensuse-updates/2016-02/msg00102.html
http://lists.opensuse.org/opensuse-updates/2016-02/msg00142.html
http://www.mozilla.org/security/announce/2016/mfsa2016-13.html
http://www.securitytracker.com/id/1035007
http://www.ubuntu.com/usn/USN-2893-1

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