{"cve":"CVE-2006-4253","nvd":{"published":"2006-08-21T20:04:00.000","modified":"2026-06-16T22:28:43.270","status":"Modified","description":"Concurrency vulnerability in Mozilla Firefox 1.5.0.6 and earlier allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via multiple Javascript timed events that load a deeply nested XML file, followed by redirecting the browser to another page, which leads to a concurrency failure that causes structures to be freed incorrectly, as demonstrated by (1) ffoxdie and (2) ffoxdie3.  NOTE: it has been reported that Netscape 8.1 and K-Meleon 1.0.1 are also affected by ffoxdie.  Mozilla confirmed to CVE that ffoxdie and ffoxdie3 trigger the same underlying vulnerability.  NOTE: it was later reported that Firefox 2.0 RC2 and 1.5.0.7 are also affected.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-264"],"references":["ftp://patches.sgi.com/support/free/security/advisories/20060901-01-P.asc","http://lcamtuf.coredump.cx/ffoxdie.html","http://lcamtuf.coredump.cx/ffoxdie3.html","http://secunia.com/advisories/21513","http://secunia.com/advisories/21906"],"products":["k-meleon_project:k-meleon","mozilla:firefox","netscape:navigator"],"source":"nvd","synced_at":"2026-10-19T19:42:44.451428143+00:00"},"epss":{"cve":"CVE-2006-4253","score":0.15185,"percentile":0.9675,"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."]}