{"schemaVersion":3,"id":"CVE-2017-9781","aliases":["UBUNTU-CVE-2017-9781"],"status":"published","duplicateOf":null,"title":null,"description":"A cross site scripting (XSS) vulnerability exists in Check_MK versions 1.4.0x prior to 1.4.0p6, allowing an unauthenticated remote attacker to inject arbitrary HTML or JavaScript via the _username parameter when attempting authentication to webapi.py, which is returned unencoded with content type text/html.","dates":{"published":"2017-06-21T18:00:00.000Z","modified":"2024-08-05T17:18:01.918Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":6.1,"severity":"medium","version":"3.0","versionLabel":"v3.0","source":"NVD","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.0","versionLabel":"v3.0","source":"NVD","score":6.1,"severity":"medium","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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:N/I:P/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.0","versionLabel":"v3.0","source":"OSV · Ubuntu","score":6.1,"severity":"medium","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","exploitability":7.2,"impact":4.5,"computed":true}]},"epss":{"probability":0.01559,"percentile":0.74874,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.01559},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01901,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.01559,"percentile":0.74874}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01901,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01559,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.01559,"percentile":0.74874}]},"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_926CAD1CF78647BC","name":"Exploit Reference (tenable.com)","source":"reference","url":"https://www.tenable.com/security/research/tra-2017-21","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":1,"weaknesses":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","description":"The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.","type":"weakness","status":"Stable","abstraction":"Base","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/79.html"}],"affected":[{"vendor":"check_mk_project","product":"check_mk","name":"check mk","label":"check_mk","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"1.4.0","noFixRecorded":false,"fixedIn":null},{"text":"1.4.0:p1","noFixRecorded":false,"fixedIn":null},{"text":"1.4.0:p2","noFixRecorded":false,"fixedIn":null},{"text":"1.4.0:p3","noFixRecorded":false,"fixedIn":null},{"text":"1.4.0:p4","noFixRecorded":false,"fixedIn":null},{"text":"1.4.0:p5","noFixRecorded":false,"fixedIn":null}],"versionsText":"1.4.0 | 1.4.0:p1 | 1.4.0:p2 | 1.4.0:p3 | 1.4.0:p4 | 1.4.0:p5","eol":null,"hubHref":"/vendor/check_mk_project/check_mk"},{"vendor":"ubuntu","product":"check-mk","name":"check-mk","label":"check-mk","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/check-mk","purlType":"deb","versions":[{"text":"< 1.2.6p12-1ubuntu0.16.04.1+esm1","noFixRecorded":false,"fixedIn":null},{"text":"< 1.2.8p16-1ubuntu0.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.2.6p12-1ubuntu0.16.04.1+esm1 | < 1.2.8p16-1ubuntu0.2","eol":null,"hubHref":null}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"http://git.mathias-kettner.de/git/?p=check_mk.git%3Ba=blob%3Bf=.werks/4757%3Bhb=c248f0b6ff7b15ced9f07a3df8a80fad656ea5b1","label":"git.mathias-kettner.de/git","hostname":"git.mathias-kettner.de","tags":["X Refsource CONFIRM"]},{"url":"https://www.tenable.com/security/research/tra-2017-21","label":"www.tenable.com/security/research/tra-2017-21","hostname":"www.tenable.com","tags":["X Refsource MISC","Exploit","Third Party Advisory"]},{"url":"https://ubuntu.com/security/CVE-2017-9781","label":"ubuntu.com/security/CVE-2017-9781","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"http://git.mathias-kettner.de/git/?p=check_mk.git;a=blob;f=.werks/4757;hb=c248f0b6ff7b15ced9f07a3df8a80fad656ea5b1","label":"git.mathias-kettner.de/git","hostname":"git.mathias-kettner.de","tags":["REPORT"]},{"url":"https://ubuntu.com/security/notices/USN-5527-1","label":"ubuntu.com/security/notices/USN-5527-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2017-9781","label":"www.cve.org/CVERecord?id=CVE-2017-9781","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://ubuntu.com/security/notices/USN-5527-2","label":"ubuntu.com/security/notices/USN-5527-2","hostname":"ubuntu.com","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":["USN-5527-1","USN-5527-2"],"duplicates":[],"related":["USN-5527-1","USN-5527-2"]},"timeline":[{"kind":"published","date":"2017-06-21T18:00:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-05T17:18:01.918Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":35,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T14:15:54.719Z","stale":false,"partial":false}}