{"cve":"CVE-2020-15664","nvd":{"published":"2020-10-01T19:15:13.047","modified":"2026-08-19T15:50:13.607","status":"Modified","description":"By holding a reference to the eval() function from an about:blank window, a malicious webpage could have gained access to the InstallTrigger object which would allow them to prompt the user to install an extension. Combined with user confusion, this could result in an unintended or malicious extension being installed. This vulnerability affects Firefox < 80, Thunderbird < 78.2, Thunderbird < 68.12, Firefox ESR < 68.12, Firefox ESR < 78.2, and Firefox for Android < 80.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","score":6.5},"cwes":["CWE-863"],"references":["https://bugzilla.mozilla.org/show_bug.cgi?id=1658214","https://www.mozilla.org/security/advisories/mfsa2020-36/","https://www.mozilla.org/security/advisories/mfsa2020-37/","https://www.mozilla.org/security/advisories/mfsa2020-38/","https://www.mozilla.org/security/advisories/mfsa2020-39/"],"products":["mozilla:firefox","mozilla:firefox_esr","mozilla:firefox_mobile","mozilla:thunderbird"],"source":"nvd","synced_at":"2026-10-19T21:09:53.489947993+00:00"},"epss":{"cve":"CVE-2020-15664","score":0.01389,"percentile":0.72318,"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."]}