{"cve":"CVE-2012-4207","nvd":{"published":"2012-11-21T12:55:02.023","modified":"2026-06-16T23:44:36.947","status":"Modified","description":"The HZ-GB-2312 character-set implementation in Mozilla Firefox before 17.0, Firefox ESR 10.x before 10.0.11, Thunderbird before 17.0, Thunderbird ESR 10.x before 10.0.11, and SeaMonkey before 2.14 does not properly handle a ~ (tilde) character in proximity to a chunk delimiter, which allows remote attackers to conduct cross-site scripting (XSS) attacks via a crafted document.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-79"],"references":["http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00021.html","http://lists.opensuse.org/opensuse-security-announce/2013-01/msg00022.html","http://lists.opensuse.org/opensuse-updates/2012-11/msg00090.html","http://lists.opensuse.org/opensuse-updates/2012-11/msg00092.html","http://lists.opensuse.org/opensuse-updates/2012-11/msg00093.html"],"products":["canonical:ubuntu_linux","debian:debian_linux","mozilla:firefox","mozilla:seamonkey","mozilla:thunderbird","mozilla:thunderbird_esr","opensuse:opensuse","redhat:enterprise_linux_desktop","redhat:enterprise_linux_eus","redhat:enterprise_linux_server","redhat:enterprise_linux_workstation","suse:linux_enterprise_desktop","suse:linux_enterprise_server","suse:linux_enterprise_software_development_kit"],"source":"nvd","synced_at":"2026-10-19T20:25:53.526315492+00:00"},"epss":{"cve":"CVE-2012-4207","score":0.02781,"percentile":0.8638,"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."]}