{"cve":"CVE-2016-2820","nvd":{"published":"2016-04-30T17:59:15.773","modified":"2026-06-17T00:44:31.513","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","score":4.3},"cwes":["CWE-284"],"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"],"products":["mozilla:firefox"],"source":"nvd","synced_at":"2026-10-19T20:38:51.654415212+00:00"},"epss":{"cve":"CVE-2016-2820","score":0.0141,"percentile":0.72663,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}