{"schemaVersion":3,"id":"CVE-2017-5493","aliases":["UBUNTU-CVE-2017-5493","DEBIAN-CVE-2017-5493"],"status":"published","duplicateOf":null,"title":null,"description":"wp-includes/ms-functions.php in the Multisite WordPress API in WordPress before 4.7.1 does not properly choose random numbers for keys, which makes it easier for remote attackers to bypass intended access restrictions via a crafted (1) site signup or (2) user signup.","dates":{"published":"2017-01-15T02:00:00.000Z","modified":"2024-08-05T15:04:14.697Z","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},{"version":"3.0","versionLabel":"v3.0","source":"OSV · Debian","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},{"version":"3.1","versionLabel":"v3.1","source":"wordfence","score":5.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.02886,"percentile":0.86679,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.02886},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.02942,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.02886,"percentile":0.86679}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.02942,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.02886,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.02886,"percentile":0.86679}]},"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-338","name":"Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)","description":"The product uses a Pseudo-Random Number Generator (PRNG) in a security context, but the PRNG's algorithm is not cryptographically strong.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":"Medium","url":"https://cwe.mitre.org/data/definitions/338.html"}],"affected":[{"vendor":"debian","product":"wordpress","name":"wordpress","label":"wordpress","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/wordpress","purlType":"deb","versions":[{"text":"< 4.7.1+dfsg-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.7.1+dfsg-1","eol":null,"hubHref":null},{"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 3.7.17)","noFixRecorded":false,"fixedIn":"3.7.17"},{"text":"≥ 3.7, ≤ 3.7.16 (fixed in 3.7.17)","noFixRecorded":false,"fixedIn":"3.7.17"},{"text":"≥ 3.8, ≤ 3.8.16 (fixed in 3.7.17)","noFixRecorded":false,"fixedIn":"3.7.17"},{"text":"≥ 3.9, ≤ 3.9.14 (fixed in 3.7.17)","noFixRecorded":false,"fixedIn":"3.7.17"},{"text":"≥ 4.0, ≤ 4.0.13 (fixed in 3.7.17)","noFixRecorded":false,"fixedIn":"3.7.17"},{"text":"≥ 4.1, ≤ 4.1.13 (fixed in 3.7.17)","noFixRecorded":false,"fixedIn":"3.7.17"},{"text":"≥ 4.2, ≤ 4.2.10 (fixed in 3.7.17)","noFixRecorded":false,"fixedIn":"3.7.17"},{"text":"≥ 4.3, ≤ 4.3.6 (fixed in 3.7.17)","noFixRecorded":false,"fixedIn":"3.7.17"},{"text":"≥ 4.4, ≤ 4.4.5 (fixed in 3.7.17)","noFixRecorded":false,"fixedIn":"3.7.17"},{"text":"≥ 4.5, ≤ 4.5.4 (fixed in 3.7.17)","noFixRecorded":false,"fixedIn":"3.7.17"},{"text":"≥ 4.6, ≤ 4.6.1 (fixed in 3.7.17)","noFixRecorded":false,"fixedIn":"3.7.17"},{"text":"≥ 4.7, ≤ 4.7.0 (fixed in 3.7.17)","noFixRecorded":false,"fixedIn":"3.7.17"}],"versionsText":"< 3.7 (fixed in 3.7.17) | ≥ 3.7, ≤ 3.7.16 (fixed in 3.7.17) | ≥ 3.8, ≤ 3.8.16 (fixed in 3.7.17) | ≥ 3.9, ≤ 3.9.14 (fixed in 3.7.17) | ≥ 4.0, ≤ 4.0.13 (fixed in 3.7.17) | ≥ 4.1, ≤ 4.1.13 (fixed in 3.7.17) | ≥ 4.2, ≤ 4.2.10 (fixed in 3.7.17) | ≥ 4.3, ≤ 4.3.6 (fixed in 3.7.17) | ≥ 4.4, ≤ 4.4.5 (fixed in 3.7.17) | ≥ 4.5, ≤ 4.5.4 (fixed in 3.7.17) | ≥ 4.6, ≤ 4.6.1 (fixed in 3.7.17) | ≥ 4.7, ≤ 4.7.0 (fixed in 3.7.17)","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":"≤ 4.7","noFixRecorded":false,"fixedIn":null}],"versionsText":"≤ 4.7","eol":{"isEol":null,"eolDate":null,"matchMethod":"cpe","cycle":null,"product":{"name":"wordpress","label":"WordPress","category":"server-app"}},"hubHref":"/vendor/wordpress/wordpress"}],"affectedCount":4,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://wpvulndb.com/vulnerabilities/8721","label":"wpvulndb.com/vulnerabilities/8721","hostname":"wpvulndb.com","tags":["X Refsource MISC","REPORT"]},{"url":"http://www.securityfocus.com/bid/95401","label":"www.securityfocus.com/bid/95401","hostname":"www.securityfocus.com","tags":["VDB Entry","X Refsource BID"]},{"url":"http://www.debian.org/security/2017/dsa-3779","label":"www.debian.org/security/2017/dsa-3779","hostname":"www.debian.org","tags":["Vendor Advisory","X Refsource DEBIAN"]},{"url":"https://codex.wordpress.org/Version_4.7.1","label":"codex.wordpress.org/Version_4.7.1","hostname":"codex.wordpress.org","tags":["X Refsource CONFIRM","Release Notes","Vendor Advisory","REPORT"]},{"url":"http://www.openwall.com/lists/oss-security/2017/01/14/6","label":"www.openwall.com/lists/oss-security/2017/01/14/6","hostname":"www.openwall.com","tags":["Mailing List","X Refsource MLIST","Third Party Advisory","REPORT"]},{"url":"http://www.securitytracker.com/id/1037591","label":"www.securitytracker.com/id/1037591","hostname":"www.securitytracker.com","tags":["VDB Entry","X Refsource SECTRACK"]},{"url":"https://github.com/WordPress/WordPress/commit/cea9e2dc62abf777e06b12ec4ad9d1aaa49b29f4","label":"github.com/WordPress/WordPress/commit/cea9e2dc62abf777e06b12ec4ad9d1aaa49b29f4","hostname":"github.com","tags":["X Refsource CONFIRM","Patch","REPORT"]},{"url":"https://wordpress.org/news/2017/01/wordpress-4-7-1-security-and-maintenance-release/","label":"wordpress.org/news/2017/01/wordpress-4-7-1-security-and-maintenance-release/","hostname":"wordpress.org","tags":["X Refsource CONFIRM","Vendor Advisory","REPORT"]},{"url":"https://ubuntu.com/security/CVE-2017-5493","label":"ubuntu.com/security/CVE-2017-5493","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"http://www.openwall.com/lists/oss-security/2017/01/14/1","label":"www.openwall.com/lists/oss-security/2017/01/14/1","hostname":"www.openwall.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2017-5493","label":"www.cve.org/CVERecord?id=CVE-2017-5493","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2017-5493","label":"security-tracker.debian.org/tracker/CVE-2017-5493","hostname":"security-tracker.debian.org","tags":["Advisory"]},{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/14b7fd1e-6e2d-49bb-8492-b072afeebd88","label":"www.wordfence.com/threat-intel/vulnerabilities/id/14b7fd1e-6e2d-49bb-8492-b072afeebd88","hostname":"www.wordfence.com","tags":["Vendor Advisory"]}],"lineage":{"upstream":[],"downstream":["DLA-813-1","DSA-3779-1"],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2017-01-15T02:00:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-05T15:04:14.697Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":31,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T11:32:49.830Z","stale":false,"partial":false}}