{"id":"USN-4893-1","summary":"firefox vulnerabilities","details":"Multiple security issues were discovered in Firefox. If a user were\ntricked into opening a specially crafted website, an attacker could\npotentially exploit these to cause a denial of service, obtain sensitive\ninformation, or execute arbitrary code. (CVE-2021-23981, CVE-2021-23982,\nCVE-2021-23983, CVE-2021-23987, CVE-2021-23988)\n\nIt was discovered that extensions could open popup windows with control\nof the window title in some circumstances. If a user were tricked into\ninstalling a specially crafted extension, an attacker could potentially\nexploit this to spook a website and trick the user into providing\ncredentials. (CVE-2021-23984)\n\nIt was discovered that the DevTools remote debugging feature could be\nenabled without an indication to the user. If a local attacker could\nmodify the browser configuration, a remote attacker could potentially\nexploit this to obtain sensitive information. (CVE-2021-23985)\n\nIt was discovered that extensions could read the response of cross\norigin requests in some circumstances. If a user were tricked into\ninstalling a specially crafted extension, an attacker could potentially\nexploit this to obtain sensitive information. (CVE-2021-23986)\n","modified":"2026-02-10T04:42:07Z","published":"2021-03-25T22:36:31Z","related":["UBUNTU-CVE-2021-23981","UBUNTU-CVE-2021-23982","UBUNTU-CVE-2021-23983","UBUNTU-CVE-2021-23984","UBUNTU-CVE-2021-23985","UBUNTU-CVE-2021-23986","UBUNTU-CVE-2021-23987","UBUNTU-CVE-2021-23988"],"upstream":["CVE-2021-23981","CVE-2021-23982","CVE-2021-23983","CVE-2021-23984","CVE-2021-23985","CVE-2021-23986","CVE-2021-23987","CVE-2021-23988","UBUNTU-CVE-2021-23981","UBUNTU-CVE-2021-23982","UBUNTU-CVE-2021-23983","UBUNTU-CVE-2021-23984","UBUNTU-CVE-2021-23985","UBUNTU-CVE-2021-23986","UBUNTU-CVE-2021-23987","UBUNTU-CVE-2021-23988"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4893-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-23981"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-23982"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-23983"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-23984"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-23985"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-23986"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-23987"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-23988"}],"affected":[{"package":{"name":"firefox","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/firefox@87.0+build3-0ubuntu0.16.04.2?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"87.0+build3-0ubuntu0.16.04.2"}]}],"versions":["41.0.2+build2-0ubuntu1","42.0+build2-0ubuntu1","44.0+build3-0ubuntu2","44.0.1+build1-0ubuntu1","44.0.2+build1-0ubuntu1","45.0+build2-0ubuntu1","45.0.1+build1-0ubuntu1","45.0.2+build1-0ubuntu1","46.0+build5-0ubuntu0.16.04.2","46.0.1+build1-0ubuntu0.16.04.2","47.0+build3-0ubuntu0.16.04.1","48.0+build2-0ubuntu0.16.04.1","49.0+build4-0ubuntu0.16.04.1","49.0.2+build2-0ubuntu0.16.04.2","50.0+build2-0ubuntu0.16.04.2","50.0.2+build1-0ubuntu0.16.04.1","50.1.0+build2-0ubuntu0.16.04.1","51.0.1+build2-0ubuntu0.16.04.1","51.0.1+build2-0ubuntu0.16.04.2","52.0+build2-0ubuntu0.16.04.1","52.0.1+build2-0ubuntu0.16.04.1","52.0.2+build1-0ubuntu0.16.04.1","53.0+build6-0ubuntu0.16.04.1","53.0.2+build1-0ubuntu0.16.04.2","53.0.3+build1-0ubuntu0.16.04.2","54.0+build3-0ubuntu0.16.04.1","55.0.1+build2-0ubuntu0.16.04.2","55.0.2+build1-0ubuntu0.16.04.1","56.0+build6-0ubuntu0.16.04.1","56.0+build6-0ubuntu0.16.04.2","57.0+build4-0ubuntu0.16.04.5","57.0+build4-0ubuntu0.16.04.6","57.0.1+build2-0ubuntu0.16.04.1","57.0.3+build1-0ubuntu0.16.04.1","57.0.4+build1-0ubuntu0.16.04.1","58.0+build6-0ubuntu0.16.04.1","58.0.1+build1-0ubuntu0.16.04.1","58.0.2+build1-0ubuntu0.16.04.1","59.0+build5-0ubuntu0.16.04.1","59.0.1+build1-0ubuntu0.16.04.1","59.0.2+build1-0ubuntu0.16.04.1","59.0.2+build1-0ubuntu0.16.04.3","60.0+build2-0ubuntu0.16.04.1","60.0.1+build2-0ubuntu0.16.04.1","60.0.2+build1-0ubuntu0.16.04.1","61.0+build3-0ubuntu0.16.04.2","61.0.1+build1-0ubuntu0.16.04.1","62.0+build2-0ubuntu0.16.04.3","62.0+build2-0ubuntu0.16.04.4","62.0+build2-0ubuntu0.16.04.5","62.0.3+build1-0ubuntu0.16.04.2","63.0+build2-0ubuntu0.16.04.2","63.0.3+build1-0ubuntu0.16.04.1","64.0+build3-0ubuntu0.16.04.1","65.0+build2-0ubuntu0.16.04.1","65.0.1+build2-0ubuntu0.16.04.1","66.0+build3-0ubuntu0.16.04.2","66.0.1+build1-0ubuntu0.16.04.1","66.0.2+build1-0ubuntu0.16.04.1","66.0.3+build1-0ubuntu0.16.04.1","66.0.4+build3-0ubuntu0.16.04.1","66.0.5+build1-0ubuntu0.16.04.1","67.0+build2-0ubuntu0.16.04.1","67.0.1+build1-0ubuntu0.16.04.1","67.0.2+build2-0ubuntu0.16.04.1","67.0.3+build1-0ubuntu0.16.04.1","67.0.4+build1-0ubuntu0.16.04.1","68.0+build3-0ubuntu0.16.04.1","68.0.1+build1-0ubuntu0.16.04.1","68.0.2+build1-0ubuntu0.16.04.1","69.0+build2-0ubuntu0.16.04.4","69.0.1+build1-0ubuntu0.16.04.1","69.0.2+build1-0ubuntu0.16.04.1","70.0+build2-0ubuntu0.16.04.1","70.0.1+build1-0ubuntu0.16.04.1","71.0+build5-0ubuntu0.16.04.1","72.0.1+build1-0ubuntu0.16.04.1","72.0.2+build1-0ubuntu0.16.04.1","73.0.1+build1-0ubuntu0.16.04.1","74.0+build3-0ubuntu0.16.04.1","74.0.1+build1-0ubuntu0.16.04.1","75.0+build3-0ubuntu0.16.04.1","76.0+build2-0ubuntu0.16.04.1","76.0.1+build1-0ubuntu0.16.04.1","77.0.1+build1-0ubuntu0.16.04.1","78.0.1+build1-0ubuntu0.16.04.1","78.0.2+build2-0ubuntu0.16.04.1","79.0+build1-0ubuntu0.16.04.2","80.0+build2-0ubuntu0.16.04.1","80.0.1+build1-0ubuntu0.16.04.1","81.0+build2-0ubuntu0.16.04.1","81.0.2+build1-0ubuntu0.16.04.1","82.0+build2-0ubuntu0.16.04.5","82.0.2+build1-0ubuntu0.16.04.1","82.0.3+build1-0ubuntu0.16.04.1","83.0+build2-0ubuntu0.16.04.3","84.0+build3-0ubuntu0.16.04.1","84.0.1+build1-0ubuntu0.16.04.1","84.0.2+build1-0ubuntu0.16.04.1","85.0+build1-0ubuntu0.16.04.1","85.0.1+build1-0ubuntu0.16.04.1","86.0+build3-0ubuntu0.16.04.1","86.0.1+build1-0ubuntu0.16.04.2"],"ecosystem_specific":{"binaries":[{"binary_version":"87.0+build3-0ubuntu0.16.04.2","binary_name":"firefox"},{"binary_version":"87.0+build3-0ubuntu0.16.04.2","binary_name":"firefox-dev"},{"binary_ve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