{"cve":"CVE-2015-4490","nvd":{"published":"2015-08-16T01:59:18.080","modified":"2026-06-17T00:27:23.390","status":"Modified","description":"The nsCSPHostSrc::permits function in dom/security/nsCSPUtils.cpp in Mozilla Firefox before 40.0 does not implement the Content Security Policy Level 2 exceptions for the blob, data, and filesystem URL schemes during wildcard source-expression matching, which might make it easier for remote attackers to conduct cross-site scripting (XSS) attacks by leveraging unexpected policy-enforcement behavior.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-79"],"references":["http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00014.html","http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00015.html","http://www.mozilla.org/security/announce/2015/mfsa2015-91.html","http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html","http://www.securitytracker.com/id/1033247"],"products":["canonical:ubuntu_linux","mozilla:firefox","opensuse:opensuse","oracle:solaris"],"source":"nvd","synced_at":"2026-10-19T20:36:40.444340523+00:00"},"epss":{"cve":"CVE-2015-4490","score":0.02443,"percentile":0.84327,"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."]}