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Vulnerability details: VCID-vwf9-pj2p-hqat
Vulnerability ID VCID-vwf9-pj2p-hqat
Aliases CVE-2015-4478
Summary Security researcher André Bargull reported non-configurable properties on JavaScript objects can be redefined while parsing JSON in violation of the ECMAScript 6 standard. This allows malicious web content to bypass same-origin policy by editing these properties to arbitrary values.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (0)
There are no known CWE.
System Score Found at
epss 0.01264 https://api.first.org/data/v1/epss?cve=CVE-2015-4478
epss 0.01264 https://api.first.org/data/v1/epss?cve=CVE-2015-4478
epss 0.01264 https://api.first.org/data/v1/epss?cve=CVE-2015-4478
epss 0.01264 https://api.first.org/data/v1/epss?cve=CVE-2015-4478
epss 0.01264 https://api.first.org/data/v1/epss?cve=CVE-2015-4478
epss 0.01264 https://api.first.org/data/v1/epss?cve=CVE-2015-4478
epss 0.01264 https://api.first.org/data/v1/epss?cve=CVE-2015-4478
epss 0.01264 https://api.first.org/data/v1/epss?cve=CVE-2015-4478
epss 0.01264 https://api.first.org/data/v1/epss?cve=CVE-2015-4478
epss 0.01264 https://api.first.org/data/v1/epss?cve=CVE-2015-4478
epss 0.01264 https://api.first.org/data/v1/epss?cve=CVE-2015-4478
epss 0.01264 https://api.first.org/data/v1/epss?cve=CVE-2015-4478
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2015-82
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2015-4478.json
https://api.first.org/data/v1/epss?cve=CVE-2015-4478
1252282 https://bugzilla.redhat.com/show_bug.cgi?id=1252282
CVE-2015-4478 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-4478
mfsa2015-82 https://www.mozilla.org/en-US/security/advisories/mfsa2015-82
RHSA-2015:1586 https://access.redhat.com/errata/RHSA-2015:1586
USN-2702-1 https://usn.ubuntu.com/2702-1/
No exploits are available.
Exploit Prediction Scoring System (EPSS)
Percentile 0.786
EPSS Score 0.01264
Published At Aug. 16, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:10:57.642959+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2015/mfsa2015-82.md 37.0.0