{"cve":"CVE-2009-3376","nvd":{"published":"2009-10-29T14:30:00.983","modified":"2026-06-16T23:11:29.263","status":"Modified","description":"Mozilla Firefox before 3.0.15 and 3.5.x before 3.5.4, and SeaMonkey before 2.0, does not properly handle a right-to-left override (aka RLO or U+202E) Unicode character in a download filename, which allows remote attackers to spoof file extensions via a crafted filename, as demonstrated by displaying a non-executable extension for an executable file.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-16"],"references":["http://lists.opensuse.org/opensuse-security-announce/2010-06/msg00001.html","http://secunia.com/advisories/38977","http://sunsolve.sun.com/search/document.do?assetkey=1-26-272909-1","http://www.mandriva.com/security/advisories?name=MDVSA-2009:294","http://www.mozilla.org/security/announce/2009/mfsa2009-62.html"],"products":["mozilla:firefox","mozilla:seamonkey"],"source":"nvd","synced_at":"2026-10-19T19:54:26.868835795+00:00"},"epss":{"cve":"CVE-2009-3376","score":0.03183,"percentile":0.88078,"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."]}