{"cve":"CVE-2015-4498","nvd":{"published":"2015-08-29T19:59:01.827","modified":"2026-06-17T00:27:24.657","status":"Modified","description":"The add-on installation feature in Mozilla Firefox before 40.0.3 and Firefox ESR 38.x before 38.2.1 allows remote attackers to bypass an intended user-confirmation requirement by constructing a crafted data: URL and triggering navigation to an arbitrary http: or https: URL at a certain early point in the installation process.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-254"],"references":["http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00013.html","http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00025.html","http://lists.opensuse.org/opensuse-updates/2015-09/msg00000.html","http://rhn.redhat.com/errata/RHSA-2015-1693.html","http://www.debian.org/security/2015/dsa-3345"],"products":["mozilla:firefox"],"source":"nvd","synced_at":"2026-10-19T20:37:45.466985407+00:00"},"epss":{"cve":"CVE-2015-4498","score":0.02678,"percentile":0.85808,"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."]}