{"schemaVersion":3,"id":"CVE-2017-5421","aliases":["UBUNTU-CVE-2017-5421"],"status":"published","duplicateOf":null,"title":null,"description":"A malicious site could spoof the contents of the print preview window if popup windows are enabled, resulting in user confusion of what site is currently loaded. This vulnerability affects Firefox < 52 and Thunderbird < 52.","dates":{"published":"2018-06-11T21:00:00.000Z","modified":"2024-08-05T15:04:13.319Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.5,"severity":"high","version":"3.0","versionLabel":"v3.0","source":"NVD","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.0","versionLabel":"v3.0","source":"NVD","score":7.5,"severity":"high","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":5,"severity":"medium","vector":"AV:N/AC:L/Au:N/C:N/I:P/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.0","versionLabel":"v3.0","source":"OSV · Ubuntu","score":7.5,"severity":"high","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","exploitability":10,"impact":6,"computed":true}]},"epss":{"probability":0.01883,"percentile":0.79171,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":-0.039000000000000146,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.01922},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01838,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01883,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01883,"percentile":0.79171}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01838,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01922,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01883,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01883,"percentile":0.79171}]},"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":[{"id":"REF_A25B23557C389893","name":"Exploit Reference (bugzilla.mozilla.org)","source":"reference","url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1301876","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":1,"weaknesses":[{"id":"CWE-20","name":"Improper Input Validation","description":"The product receives input or data, but it does\n        not validate or incorrectly validates that the input has the\n        properties that are required to process the data safely and\n        correctly.","type":"weakness","status":"Stable","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/20.html"}],"affected":[{"vendor":"ubuntu","product":"firefox","name":"firefox","label":"firefox","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/firefox","purlType":"deb","versions":[{"text":"< 52.0+build2-0ubuntu0.14.04.1","noFixRecorded":false,"fixedIn":null},{"text":"< 52.0+build2-0ubuntu0.16.04.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 52.0+build2-0ubuntu0.14.04.1 | < 52.0+build2-0ubuntu0.16.04.1","eol":null,"hubHref":null},{"vendor":"mozilla","product":"firefox","name":"Firefox","label":"firefox","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ unspecified, < 52","noFixRecorded":false,"fixedIn":null},{"text":"< 52.0.","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ unspecified, < 52 | < 52.0.","eol":{"isEol":null,"eolDate":null,"matchMethod":"cpe","cycle":null,"product":{"name":"firefox","label":"Firefox","category":"app"}},"hubHref":"/vendor/mozilla/firefox"},{"vendor":"mozilla","product":"thunderbird","name":"Thunderbird","label":"thunderbird","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ unspecified, < 52","noFixRecorded":false,"fixedIn":null},{"text":"< 52.0.","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ unspecified, < 52 | < 52.0.","eol":null,"hubHref":"/vendor/mozilla/thunderbird"}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1301876","label":"bugzilla.mozilla.org/show_bug.cgi?id=1301876","hostname":"bugzilla.mozilla.org","tags":["X Refsource CONFIRM","Exploit","Issue Tracking","Patch","Vendor Advisory"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2017-09/","label":"www.mozilla.org/security/advisories/mfsa2017-09/","hostname":"www.mozilla.org","tags":["X Refsource CONFIRM","Vendor Advisory"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2017-05/","label":"www.mozilla.org/security/advisories/mfsa2017-05/","hostname":"www.mozilla.org","tags":["X Refsource CONFIRM","Vendor Advisory"]},{"url":"http://www.securitytracker.com/id/1037966","label":"www.securitytracker.com/id/1037966","hostname":"www.securitytracker.com","tags":["VDB Entry","X Refsource SECTRACK","Third Party Advisory"]},{"url":"http://www.securityfocus.com/bid/96692","label":"www.securityfocus.com/bid/96692","hostname":"www.securityfocus.com","tags":["VDB Entry","X Refsource BID","Third Party Advisory"]},{"url":"https://ubuntu.com/security/CVE-2017-5421","label":"ubuntu.com/security/CVE-2017-5421","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.mozilla.org/en-US/security/advisories/mfsa2017-05/#CVE-2017-5421","label":"www.mozilla.org/en-US/security/advisories/mfsa2017-05/","hostname":"www.mozilla.org","tags":["REPORT"]},{"url":"https://ubuntu.com/security/notices/USN-3216-1","label":"ubuntu.com/security/notices/USN-3216-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2017-5421","label":"www.cve.org/CVERecord?id=CVE-2017-5421","hostname":"www.cve.org","tags":["REPORT"]}],"lineage":{"upstream":[],"downstream":["MGASA-2018-0018","OPENSUSE-SU-2017:1268-1","OPENSUSE-SU-2024:10600-1","OPENSUSE-SU-2024:10601-1","OPENSUSE-SU-2024:14572-1","USN-3216-1"],"duplicates":[],"related":["OPENSUSE-SU-2017:1268-1","OPENSUSE-SU-2024:10600-1","OPENSUSE-SU-2024:10601-1","OPENSUSE-SU-2024:14572-1","USN-3216-1"]},"timeline":[{"kind":"published","date":"2018-06-11T21:00:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-05T15:04:13.319Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":40,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T22:29:04.624Z","stale":false,"partial":false}}