{"schemaVersion":3,"id":"CVE-2023-1256","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"The listed versions of AVEVA Plant SCADA and AVEVA Telemetry Server are vulnerable to an improper authorization exploit which could allow an unauthenticated user to remotely read data, cause denial of service, and tamper with alarm states.","dates":{"published":"2023-03-16T18:33:52.907Z","modified":"2025-01-16T21:42:14.018Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":9.8,"severity":"critical","version":"3.1","versionLabel":"v3.1","source":"CVE.org","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":"CVE.org","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":"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}]},"epss":{"probability":0.00678,"percentile":0.51712,"severity":"low","asOf":"2026-10-21T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-21T00:00:00.000Z","baselineScore":0.00678},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00678,"percentile":0.51712}],"last30":[{"date":"2026-09-21T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00678,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00678,"percentile":0.51712}]},"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":[],"affected":[{"vendor":"aveva","product":"aveva_plant_scada","name":"aveva plant scada","label":"aveva_plant_scada","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"2023 Update 10","noFixRecorded":false,"fixedIn":null},{"text":"2020R2 Update 10","noFixRecorded":false,"fixedIn":null},{"text":"2020r2","noFixRecorded":false,"fixedIn":null},{"text":"2020r2:update_10","noFixRecorded":false,"fixedIn":null},{"text":"2023","noFixRecorded":false,"fixedIn":null},{"text":"2023:update_10","noFixRecorded":false,"fixedIn":null}],"versionsText":"2023 Update 10 | 2020R2 Update 10 | 2020r2 | 2020r2:update_10 | 2023 | 2023:update_10","eol":null,"hubHref":"/vendor/aveva/aveva_plant_scada"},{"vendor":"aveva","product":"aveva telemetry server","name":"AVEVA Telemetry Server","label":"aveva telemetry server","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"2020 R2 SP1","noFixRecorded":false,"fixedIn":null}],"versionsText":"2020 R2 SP1","eol":null,"hubHref":"/vendor/aveva/aveva_telemetry_server"},{"vendor":"aveva","product":"telemetry_server","name":"telemetry server","label":"telemetry_server","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"2020r2","noFixRecorded":false,"fixedIn":null},{"text":"2020r2:sp1","noFixRecorded":false,"fixedIn":null}],"versionsText":"2020r2 | 2020r2:sp1","eol":null,"hubHref":"/vendor/aveva/telemetry_server"}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://www.cisa.gov/news-events/ics-advisories/icsa-23-073-04","label":"www.cisa.gov/news-events/ics-advisories/icsa-23-073-04","hostname":"www.cisa.gov","tags":["Third Party Advisory","US Government Resource"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2023-03-16T18:33:52.907Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2025-01-16T21:42:14.018Z","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":"2026-10-21T18:29:17.848Z","stale":false,"partial":false}}