{"schemaVersion":3,"id":"CVE-2023-4583","aliases":["UBUNTU-CVE-2023-4583","DEBIAN-CVE-2023-4583","CGA-53h7-w9jp-46c4","CGA-cf97-xj8w-4c3f"],"status":"published","duplicateOf":null,"title":null,"description":"When checking if the Browsing Context had been discarded in `HttpBaseChannel`, if the load group was not available then it was assumed to have already been discarded which was not always the case for private channels after the private session had ended. This vulnerability affects Firefox < 117, Firefox ESR < 115.2, and Thunderbird < 115.2.","dates":{"published":"2023-09-11T08:02:01.933Z","modified":"2025-12-18T15:23:17.682Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.5,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","exploitability":10,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Debian","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","exploitability":10,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Chainguard","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","exploitability":10,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00685,"percentile":0.51774,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.00685},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00685,"percentile":0.51774}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00685,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00685,"percentile":0.51774}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-754","name":"Improper Check for Unusual or Exceptional Conditions","description":"The product does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the product.","type":"weakness","status":"Incomplete","abstraction":"Class","likelihoodOfExploit":"Medium","url":"https://cwe.mitre.org/data/definitions/754.html"}],"affected":[{"vendor":"chainguard","product":"firefox-esr","name":"firefox-esr","label":"firefox-esr","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/firefox-esr","purlType":"apk","versions":[{"text":"< 117.0-r0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 117.0-r0","eol":null,"hubHref":null},{"vendor":"debian","product":"firefox-esr","name":"firefox-esr","label":"firefox-esr","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/firefox-esr","purlType":"deb","versions":[{"text":"< 115.2.0esr-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 115.2.0esr-1","eol":null,"hubHref":null},{"vendor":"debian","product":"thunderbird","name":"thunderbird","label":"thunderbird","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/thunderbird","purlType":"deb","versions":[{"text":"< 1:115.2.0-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1:115.2.0-1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"firefox","name":"firefox","label":"firefox","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/firefox","purlType":"deb","versions":[{"text":"< 117.0+build2-0ubuntu0.20.04.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 117.0+build2-0ubuntu0.20.04.1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"mozjs102","name":"mozjs102","label":"mozjs102","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/mozjs102","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"mozjs38","name":"mozjs38","label":"mozjs38","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/mozjs38","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"mozjs52","name":"mozjs52","label":"mozjs52","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/mozjs52","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"mozjs68","name":"mozjs68","label":"mozjs68","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/mozjs68","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"mozjs78","name":"mozjs78","label":"mozjs78","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/mozjs78","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"mozjs91","name":"mozjs91","label":"mozjs91","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/mozjs91","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"thunderbird","name":"thunderbird","label":"thunderbird","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/thunderbird","purlType":"deb","versions":[{"text":"< 1:115.3.1+build1-0ubuntu0.20.04.1","noFixRecorded":false,"fixedIn":null},{"text":"< 1:115.3.1+build1-0ubuntu0.22.04.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1:115.3.1+build1-0ubuntu0.20.04.1 | < 1:115.3.1+build1-0ubuntu0.22.04.2","eol":null,"hubHref":null},{"vendor":"mozilla","product":"firefox","name":"Firefox","label":"firefox","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ unspecified, < 117","noFixRecorded":false,"fixedIn":null},{"text":"< 117.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ unspecified, < 117 | < 117.0","eol":{"isEol":null,"eolDate":null,"matchMethod":"cpe","cycle":null,"product":{"name":"firefox","label":"Firefox","category":"app"}},"hubHref":"/vendor/mozilla/firefox"},{"vendor":"mozilla","product":"firefox_esr","name":"firefox esr","label":"firefox_esr","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ unspecified, < 115.2","noFixRecorded":false,"fixedIn":null},{"text":"< 115.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ unspecified, < 115.2 | < 115.2","eol":null,"hubHref":"/vendor/mozilla/firefox_esr"},{"vendor":"mozilla","product":"thunderbird","name":"Thunderbird","label":"thunderbird","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ unspecified, < 115.2","noFixRecorded":false,"fixedIn":null},{"text":"< 115.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ unspecified, < 115.2 | < 115.2","eol":null,"hubHref":"/vendor/mozilla/thunderbird"}],"affectedCount":14,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1842030","label":"bugzilla.mozilla.org/show_bug.cgi?id=1842030","hostname":"bugzilla.mozilla.org","tags":["REPORT","Issue Tracking"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2023-34/","label":"www.mozilla.org/security/advisories/mfsa2023-34/","hostname":"www.mozilla.org","tags":["Advisory","Vendor Advisory"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2023-36/","label":"www.mozilla.org/security/advisories/mfsa2023-36/","hostname":"www.mozilla.org","tags":["Advisory","Vendor Advisory"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2023-38/","label":"www.mozilla.org/security/advisories/mfsa2023-38/","hostname":"www.mozilla.org","tags":["Advisory","Vendor Advisory"]},{"url":"https://ubuntu.com/security/CVE-2023-4583","label":"ubuntu.com/security/CVE-2023-4583","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/notices/USN-6320-1","label":"ubuntu.com/security/notices/USN-6320-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/notices/USN-6405-1","label":"ubuntu.com/security/notices/USN-6405-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-4583","label":"www.cve.org/CVERecord?id=CVE-2023-4583","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2023-4583","label":"security-tracker.debian.org/tracker/CVE-2023-4583","hostname":"security-tracker.debian.org","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":["MGASA-2023-0266","OPENSUSE-SU-2024:13176-1","OPENSUSE-SU-2024:13202-1","OPENSUSE-SU-2024:14572-1","RHSA-2023:4945","RHSA-2023:4946","RHSA-2023:4947","RHSA-2023:4948","RHSA-2023:4949","RHSA-2023:4950","RHSA-2023:4951","RHSA-2023:4952","RHSA-2023:4954","RHSA-2023:4955","RHSA-2023:4956","RHSA-2023:4957","RHSA-2023:4958","RHSA-2023:4959","RHSA-2023:5019","SUSE-SU-2023:3519-1","SUSE-SU-2023:3559-1","SUSE-SU-2023:3562-1","SUSE-SU-2023:3664-1","USN-6320-1","USN-6405-1"],"duplicates":[],"related":["CGA-P6R3-MQ89-JJW3","OPENSUSE-SU-2024:13176-1","OPENSUSE-SU-2024:13202-1","OPENSUSE-SU-2024:14572-1","SUSE-SU-2023:3519-1","SUSE-SU-2023:3559-1","SUSE-SU-2023:3562-1","SUSE-SU-2023:3664-1","USN-6320-1","USN-6405-1"]},"timeline":[{"kind":"published","date":"2023-09-11T08:02:01.933Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2025-12-18T15:23:17.682Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":30,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T16:08:09.935Z","stale":false,"partial":false}}