{"schemaVersion":3,"id":"CVE-2019-11777","aliases":["GHSA-63qc-p2x4-9fgf"],"status":"published","duplicateOf":null,"title":null,"description":"In the Eclipse Paho Java client library version 1.2.0, when connecting to an MQTT server using TLS and setting a host name verifier, the result of that verification is not checked. This could allow one MQTT server to impersonate another and provide the client library with incorrect information.","dates":{"published":"2019-09-11T17:55:21.000Z","modified":"2024-08-04T23:03:32.792Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.5,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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:P/I:N/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Maven","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","exploitability":10,"impact":6,"computed":true}]},"epss":{"probability":0.00801,"percentile":0.5592,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":-0.03300000000000004,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.00834},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00801,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00801,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00801,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00801,"percentile":0.5592}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00834,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00801,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00801,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00801,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00801,"percentile":0.5592}]},"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"},{"id":"CWE-755","name":"Improper Handling of Exceptional Conditions","description":"The product does not handle or incorrectly handles an exceptional condition.","type":"weakness","status":"Incomplete","abstraction":"Class","likelihoodOfExploit":"Medium","url":"https://cwe.mitre.org/data/definitions/755.html"}],"affected":[{"vendor":"eclipse","product":"paho_java_client","name":"paho java client","label":"paho_java_client","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"1.2.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"1.2.0","eol":null,"hubHref":"/vendor/eclipse/paho_java_client"},{"vendor":"org.eclipse.paho","product":"org.eclipse.paho.client.mqttv3","name":"org.eclipse.paho:org.eclipse.paho.client.mqttv3","label":"org.eclipse.paho.client.mqttv3","ecosystem":"Maven","cpePart":null,"purl":"pkg:maven/org.eclipse.paho/org.eclipse.paho.client.mqttv3","purlType":"maven","versions":[{"text":"< 1.2.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.2.1","eol":null,"hubHref":null},{"vendor":"the eclipse foundation","product":"eclipse paho","name":"Eclipse Paho","label":"eclipse paho","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"1.2.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"1.2.0","eol":null,"hubHref":"/vendor/the_eclipse_foundation/eclipse_paho"}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://bugs.eclipse.org/bugs/show_bug.cgi?id=549934","label":"bugs.eclipse.org/bugs/show_bug.cgi?id=549934","hostname":"bugs.eclipse.org","tags":["X Refsource CONFIRM","Issue Tracking","Vendor Advisory","WEB"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-11777","label":"nvd.nist.gov/vuln/detail/CVE-2019-11777","hostname":"nvd.nist.gov","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2019-09-11T17:55:21.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-04T23:03:32.792Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":30,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T10:10:29.832Z","stale":false,"partial":false}}