{"schemaVersion":3,"id":"CVE-2017-18915","aliases":["GHSA-hxxj-8phw-74vw","GO-2026-4462"],"status":"published","duplicateOf":null,"title":null,"description":"An issue was discovered in Mattermost Server before 3.8.2, 3.7.5, and 3.6.7. After a restart of a server, an attacker might suddenly gain API Endpoint access.","dates":{"published":"2020-06-19T19:16:03.000Z","modified":"2024-08-05T21:37:44.314Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":9.8,"severity":"critical","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:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":9.8,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/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":7.5,"severity":"high","vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Go","score":9.8,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":10,"impact":9.8,"computed":true}]},"epss":{"probability":0.01184,"percentile":0.67556,"severity":"low","asOf":"2026-10-22T00:00:00.000Z","change":{"pp":0.00899999999999998,"baselineDate":"2026-09-22T00:00:00.000Z","baselineScore":0.01175},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.01175,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.01175,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.01175,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.01175,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.01175,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.01175,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01175,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01175,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01175,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01175,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-22T00:00:00.000Z","score":0.01184,"percentile":0.67556}],"last30":[{"date":"2026-09-22T00:00:00.000Z","score":0.01175,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01175,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.01184,"percentile":null},{"date":"2026-10-22T00:00:00.000Z","score":0.01184,"percentile":0.67556}]},"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-276","name":"Incorrect Default Permissions","description":"During installation, installed file permissions are set to allow anyone to modify those files.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":"Medium","url":"https://cwe.mitre.org/data/definitions/276.html"}],"affected":[{"vendor":"github.com/mattermost","product":"mattermost-server","name":"github.com/mattermost/mattermost-server","label":"mattermost-server","ecosystem":"Go","cpePart":null,"purl":"pkg:golang/github.com/mattermost/mattermost-server","purlType":"golang","versions":[{"text":"< 3.6.7-0.20170420152529-0968e4079e0a","noFixRecorded":false,"fixedIn":null},{"text":"≥ 3.7.0, < 3.7.5","noFixRecorded":false,"fixedIn":null},{"text":"≥ 3.8.0, < 3.8.2","noFixRecorded":false,"fixedIn":null},{"text":"≥ 3.8.0+incompatible, < 3.8.2+incompatible","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.6.7-0.20170420152529-0968e4079e0a | ≥ 3.7.0, < 3.7.5 | ≥ 3.8.0, < 3.8.2 | ≥ 3.8.0+incompatible, < 3.8.2+incompatible","eol":null,"hubHref":null},{"vendor":"mattermost","product":"mattermost_server","name":"mattermost server","label":"mattermost_server","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 3.6.0, < 3.6.7","noFixRecorded":false,"fixedIn":null},{"text":"≥ 3.7.0, < 3.7.5","noFixRecorded":false,"fixedIn":null},{"text":"≥ 3.8.0, < 3.8.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 3.6.0, < 3.6.7 | ≥ 3.7.0, < 3.7.5 | ≥ 3.8.0, < 3.8.2","eol":{"isEol":null,"eolDate":null,"matchMethod":"cpe","cycle":null,"product":{"name":"mattermost","label":"Mattermost","category":"server-app"}},"hubHref":"/vendor/mattermost/mattermost_server"}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://mattermost.com/security-updates/","label":"mattermost.com/security-updates/","hostname":"mattermost.com","tags":["X Refsource CONFIRM","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-18915","label":"nvd.nist.gov/vuln/detail/CVE-2017-18915","hostname":"nvd.nist.gov","tags":["Advisory"]},{"url":"https://github.com/mattermost/mattermost/commit/0968e4079e0aa670254f3fe3a7248d126e3cf877","label":"github.com/mattermost/mattermost/commit/0968e4079e0aa670254f3fe3a7248d126e3cf877","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/mattermost/mattermost/commit/c7bdce8a6641ed8d361a43b6004a351535c78423","label":"github.com/mattermost/mattermost/commit/c7bdce8a6641ed8d361a43b6004a351535c78423","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/mattermost/mattermost/commit/fb325cc339eb8d8efb60dbadc48fd38897201c6f","label":"github.com/mattermost/mattermost/commit/fb325cc339eb8d8efb60dbadc48fd38897201c6f","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/mattermost/mattermost","label":"github.com/mattermost/mattermost","hostname":"github.com","tags":["PACKAGE"]},{"url":"https://mattermost.com/security-updates","label":"mattermost.com/security-updates","hostname":"mattermost.com","tags":["WEB"]},{"url":"https://github.com/advisories/GHSA-hxxj-8phw-74vw","label":"github.com/advisories/GHSA-hxxj-8phw-74vw","hostname":"github.com","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":["OPENSUSE-SU-2026:21483-1","SUSE-SU-2026:0757-1"],"duplicates":[],"related":["OPENSUSE-SU-2026:21483-1","SUSE-SU-2026:0757-1"]},"timeline":[{"kind":"published","date":"2020-06-19T19:16:03.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-05T21:37:44.314Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":70,"level":"high","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-22T16:05:37.466Z","stale":false,"partial":false}}