CVE-2016-2820

4.3 mediumEPSS 1.4%

The Firefox Health Reports (aka FHR or about:healthreport) feature in Mozilla Firefox before 46.0 does not properly restrict the origin of events, which makes it easier for remote attackers to modify sharing preferences by leveraging access to the remote-report IFRAME element.

Severity

CVSS 3.0

4.3 medium

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

EPSS: 1.4% chance of exploitation in the next 30 days; higher than 72% of CVEs (scores of 2026-10-31)
CWE: CWE-284
Published: 2016-04-30
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

mozilla:firefox

References

http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00005.html
http://lists.opensuse.org/opensuse-updates/2016-05/msg00038.html
http://www.mozilla.org/security/announce/2016/mfsa2016-48.html
http://www.securitytracker.com/id/1035692
http://www.ubuntu.com/usn/USN-2936-1

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