{"cve":"CVE-2019-11743","nvd":{"published":"2019-09-27T18:15:12.037","modified":"2026-06-17T02:13:32.810","status":"Modified","description":"Navigation events were not fully adhering to the W3C's \"Navigation-Timing Level 2\" draft specification in some instances for the unload event, which restricts access to detailed timing attributes to only be same-origin. This resulted in potential cross-origin information exposure of history through timing side-channel attacks. This vulnerability affects Firefox < 69, Thunderbird < 68.1, Thunderbird < 60.9, Firefox ESR < 60.9, and Firefox ESR < 68.1.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","score":3.7},"cwes":["CWE-203"],"references":["http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.html","http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.html","http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00011.html","http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00017.html","https://bugzilla.mozilla.org/show_bug.cgi?id=1560495"],"products":["mozilla:firefox","mozilla:firefox_esr","mozilla:thunderbird"],"source":"nvd","synced_at":"2026-10-19T20:59:10.855360465+00:00"},"epss":{"cve":"CVE-2019-11743","score":0.01798,"percentile":0.78459,"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."]}