{"schemaVersion":3,"id":"CVE-2018-1000773","aliases":["UBUNTU-CVE-2018-1000773"],"status":"published","duplicateOf":null,"title":null,"description":"WordPress version 4.9.8 and earlier contains a CWE-20 Input Validation vulnerability in thumbnail processing that can result in remote code execution due to an incomplete fix for CVE-2017-1000600. This attack appears to be exploitable via thumbnail upload by an authenticated user and may require additional plugins in order to be exploited however this has not been confirmed at this time.","dates":{"published":"2018-09-06T16:00:00.000Z","modified":"2024-08-05T12:40:47.939Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":8.8,"severity":"high","version":"3.0","versionLabel":"v3.0","source":"NVD","vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.0","versionLabel":"v3.0","source":"NVD","score":8.8,"severity":"high","vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":6.5,"severity":"medium","vector":"AV:N/AC:L/Au:S/C:P/I:P/A:P","exploitability":null,"impact":null,"computed":false},{"version":"3.0","versionLabel":"v3.0","source":"OSV · Ubuntu","score":8.8,"severity":"high","vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","exploitability":7.2,"impact":9.8,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"wordfence","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.08337,"percentile":0.94911,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.08337},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.06931,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.08337,"percentile":0.94911}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.06931,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.08337,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.08337,"percentile":0.94911}]},"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-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"},{"id":"CWE-502","name":"Deserialization of Untrusted Data","description":"The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":"Medium","url":"https://cwe.mitre.org/data/definitions/502.html"}],"affected":[{"vendor":"ubuntu","product":"wordpress","name":"wordpress","label":"wordpress","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/wordpress","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"wordpress","product":"wordpress","name":"WordPress","label":"wordpress","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 3.7 (fixed in 3.7.28)","noFixRecorded":false,"fixedIn":"3.7.28"},{"text":"≥ 3.7, ≤ 3.7.27 (fixed in 3.7.28)","noFixRecorded":false,"fixedIn":"3.7.28"},{"text":"≥ 3.8, ≤ 3.8.27 (fixed in 3.7.28)","noFixRecorded":false,"fixedIn":"3.7.28"},{"text":"≥ 3.9, ≤ 3.9.25 (fixed in 3.7.28)","noFixRecorded":false,"fixedIn":"3.7.28"},{"text":"≥ 4.0, ≤ 4.0.24 (fixed in 3.7.28)","noFixRecorded":false,"fixedIn":"3.7.28"},{"text":"≥ 4.1, ≤ 4.1.24 (fixed in 3.7.28)","noFixRecorded":false,"fixedIn":"3.7.28"},{"text":"≥ 4.2, ≤ 4.2.21 (fixed in 3.7.28)","noFixRecorded":false,"fixedIn":"3.7.28"},{"text":"≥ 4.3, ≤ 4.3.17 (fixed in 3.7.28)","noFixRecorded":false,"fixedIn":"3.7.28"},{"text":"≥ 4.4, ≤ 4.4.16 (fixed in 3.7.28)","noFixRecorded":false,"fixedIn":"3.7.28"},{"text":"≥ 4.5, ≤ 4.5.15 (fixed in 3.7.28)","noFixRecorded":false,"fixedIn":"3.7.28"},{"text":"≥ 4.6, ≤ 4.6.12 (fixed in 3.7.28)","noFixRecorded":false,"fixedIn":"3.7.28"},{"text":"≥ 4.7, ≤ 4.7.11 (fixed in 3.7.28)","noFixRecorded":false,"fixedIn":"3.7.28"},{"text":"≥ 4.8, ≤ 4.8.7 (fixed in 3.7.28)","noFixRecorded":false,"fixedIn":"3.7.28"},{"text":"≥ 4.9, ≤ 4.9.8 (fixed in 3.7.28)","noFixRecorded":false,"fixedIn":"3.7.28"},{"text":"5.0 (fixed in 3.7.28)","noFixRecorded":false,"fixedIn":"3.7.28"}],"versionsText":"< 3.7 (fixed in 3.7.28) | ≥ 3.7, ≤ 3.7.27 (fixed in 3.7.28) | ≥ 3.8, ≤ 3.8.27 (fixed in 3.7.28) | ≥ 3.9, ≤ 3.9.25 (fixed in 3.7.28) | ≥ 4.0, ≤ 4.0.24 (fixed in 3.7.28) | ≥ 4.1, ≤ 4.1.24 (fixed in 3.7.28) | ≥ 4.2, ≤ 4.2.21 (fixed in 3.7.28) | ≥ 4.3, ≤ 4.3.17 (fixed in 3.7.28) | ≥ 4.4, ≤ 4.4.16 (fixed in 3.7.28) | ≥ 4.5, ≤ 4.5.15 (fixed in 3.7.28) | ≥ 4.6, ≤ 4.6.12 (fixed in 3.7.28) | ≥ 4.7, ≤ 4.7.11 (fixed in 3.7.28) | ≥ 4.8, ≤ 4.8.7 (fixed in 3.7.28) | ≥ 4.9, ≤ 4.9.8 (fixed in 3.7.28) | 5.0 (fixed in 3.7.28)","eol":{"isEol":null,"eolDate":null,"matchMethod":"cpe","cycle":null,"product":{"name":"wordpress","label":"WordPress","category":"server-app"}},"hubHref":null},{"vendor":"wordpress","product":"wordpress","name":"wordpress","label":"wordpress","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≤ 4.9.8","noFixRecorded":false,"fixedIn":null}],"versionsText":"≤ 4.9.8","eol":{"isEol":null,"eolDate":null,"matchMethod":"cpe","cycle":null,"product":{"name":"wordpress","label":"WordPress","category":"server-app"}},"hubHref":"/vendor/wordpress/wordpress"}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://youtu.be/GePBmsNJw6Y?t=1763","label":"youtu.be/GePBmsNJw6Y?t=1763","hostname":"youtu.be","tags":["X Refsource MISC","Third Party Advisory","REPORT"]},{"url":"https://www.theregister.co.uk/2018/08/20/php_unserialisation_wordpress_vuln/","label":"www.theregister.co.uk/2018/08/20/php_unserialisation_wordpress_vuln/","hostname":"www.theregister.co.uk","tags":["X Refsource MISC","Third Party Advisory","REPORT"]},{"url":"http://www.securityfocus.com/bid/105306","label":"www.securityfocus.com/bid/105306","hostname":"www.securityfocus.com","tags":["VDB Entry","X Refsource BID","Third Party Advisory"]},{"url":"https://ubuntu.com/security/CVE-2018-1000773","label":"ubuntu.com/security/CVE-2018-1000773","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2018-1000773","label":"www.cve.org/CVERecord?id=CVE-2018-1000773","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/1f846ffa-0dfa-4549-845a-7884a390462a","label":"www.wordfence.com/threat-intel/vulnerabilities/id/1f846ffa-0dfa-4549-845a-7884a390462a","hostname":"www.wordfence.com","tags":["Vendor Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":["CVE-2018-1000673"],"related":[]},"timeline":[{"kind":"published","date":"2018-09-06T16:00:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-05T12:40:47.939Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":37,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T13:11:48.980Z","stale":false,"partial":false}}