{"schemaVersion":3,"id":"CVE-2018-12402","aliases":["UBUNTU-CVE-2018-12402"],"status":"published","duplicateOf":null,"title":null,"description":"The internal WebBrowserPersist code does not use correct origin context for a resource being saved. This manifests when sub-resources are loaded as part of \"Save Page As...\" functionality. For example, a malicious page could recover a visitor's Windows username and NTLM hash by including resources otherwise unreachable to the malicious page, if they can convince the visitor to save the complete web page. Similarly, SameSite cookies are sent on cross-origin requests when the \"Save Page As...\" menu item is selected to save a page, which can result in saving the wrong version of resources based on those cookies. This vulnerability affects Firefox < 63.","dates":{"published":"2019-02-28T18:00:00.000Z","modified":"2024-08-05T08:38:04.838Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":6.5,"severity":"medium","version":"3.0","versionLabel":"v3.0","source":"NVD","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.0","versionLabel":"v3.0","source":"NVD","score":6.5,"severity":"medium","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":4.3,"severity":"medium","vector":"AV:N/AC:M/Au:N/C:P/I:N/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.0","versionLabel":"v3.0","source":"OSV · Ubuntu","score":6.5,"severity":"medium","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","exploitability":7.2,"impact":6,"computed":true}]},"epss":{"probability":0.01316,"percentile":0.70542,"severity":"low","asOf":"2026-10-22T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-22T00:00:00.000Z","baselineScore":0.01316},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.0128,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-22T00:00:00.000Z","score":0.01316,"percentile":0.70542}],"last30":[{"date":"2026-09-22T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.01316,"percentile":null},{"date":"2026-10-22T00:00:00.000Z","score":0.01316,"percentile":0.70542}]},"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-346","name":"Origin Validation Error","description":"The product does not properly verify that the source of data or communication is valid.","type":"weakness","status":"Draft","abstraction":"Class","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/346.html"}],"affected":[{"vendor":"canonical","product":"ubuntu_linux","name":"ubuntu linux","label":"ubuntu_linux","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"14.04","noFixRecorded":false,"fixedIn":null},{"text":"16.04","noFixRecorded":false,"fixedIn":null},{"text":"18.04","noFixRecorded":false,"fixedIn":null},{"text":"18.10","noFixRecorded":false,"fixedIn":null}],"versionsText":"14.04 | 16.04 | 18.04 | 18.10","eol":{"isEol":true,"eolDate":"2019-04-02T00:00:00.000Z","matchMethod":"cpe","cycle":{"name":"14.04","label":"14.04 'Trusty Tahr' (LTS)","eolFrom":"2019-04-02T00:00:00.000Z","isLts":true,"isMaintained":false,"latestVersion":"14.04.6"},"product":{"name":"ubuntu","label":"Ubuntu","category":"os"}},"hubHref":"/vendor/canonical/ubuntu_linux"},{"vendor":"ubuntu","product":"firefox","name":"firefox","label":"firefox","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/firefox","purlType":"deb","versions":[{"text":"< 63.0+build2-0ubuntu0.14.04.2","noFixRecorded":false,"fixedIn":null},{"text":"< 63.0+build2-0ubuntu0.16.04.2","noFixRecorded":false,"fixedIn":null},{"text":"< 63.0+build2-0ubuntu0.18.04.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 63.0+build2-0ubuntu0.14.04.2 | < 63.0+build2-0ubuntu0.16.04.2 | < 63.0+build2-0ubuntu0.18.04.2","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":"mozilla","product":"firefox","name":"Firefox","label":"firefox","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ unspecified, < 63","noFixRecorded":false,"fixedIn":null},{"text":"< 63.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ unspecified, < 63 | < 63.0","eol":{"isEol":null,"eolDate":null,"matchMethod":"cpe","cycle":null,"product":{"name":"firefox","label":"Firefox","category":"app"}},"hubHref":"/vendor/mozilla/firefox"}],"affectedCount":5,"eol":{"hasEol":true,"count":1},"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1469916","label":"bugzilla.mozilla.org/show_bug.cgi?id=1469916","hostname":"bugzilla.mozilla.org","tags":["X Refsource CONFIRM","Issue Tracking","Permissions Required","Vendor Advisory"]},{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1447087","label":"bugzilla.mozilla.org/show_bug.cgi?id=1447087","hostname":"bugzilla.mozilla.org","tags":["X Refsource CONFIRM","Issue Tracking","Permissions Required","Vendor Advisory"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2018-26/","label":"www.mozilla.org/security/advisories/mfsa2018-26/","hostname":"www.mozilla.org","tags":["X Refsource CONFIRM","Vendor Advisory"]},{"url":"http://www.securityfocus.com/bid/105721","label":"www.securityfocus.com/bid/105721","hostname":"www.securityfocus.com","tags":["VDB Entry","X Refsource BID","Third Party Advisory"]},{"url":"https://usn.ubuntu.com/3801-1/","label":"usn.ubuntu.com/3801-1/","hostname":"usn.ubuntu.com","tags":["Vendor Advisory","X Refsource UBUNTU","Third Party Advisory"]},{"url":"http://www.securitytracker.com/id/1041944","label":"www.securitytracker.com/id/1041944","hostname":"www.securitytracker.com","tags":["VDB Entry","X Refsource SECTRACK","Third Party Advisory"]},{"url":"https://ubuntu.com/security/CVE-2018-12402","label":"ubuntu.com/security/CVE-2018-12402","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.mozilla.org/en-US/security/advisories/mfsa2018-26/#CVE-2018-12402","label":"www.mozilla.org/en-US/security/advisories/mfsa2018-26/","hostname":"www.mozilla.org","tags":["REPORT"]},{"url":"https://ubuntu.com/security/notices/USN-3801-1","label":"ubuntu.com/security/notices/USN-3801-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2018-12402","label":"www.cve.org/CVERecord?id=CVE-2018-12402","hostname":"www.cve.org","tags":["REPORT"]}],"lineage":{"upstream":[],"downstream":["OPENSUSE-SU-2024:10600-1","OPENSUSE-SU-2024:14572-1","USN-3801-1"],"duplicates":[],"related":["OPENSUSE-SU-2024:10600-1","OPENSUSE-SU-2024:14572-1","USN-3801-1"]},"timeline":[{"kind":"published","date":"2019-02-28T18:00:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-05T08:38:04.838Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":26,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-22T19:41:39.442Z","stale":false,"partial":false}}