{"cve":{"cve_id":"CVE-2023-1256","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.00678,"epss_percentile":0.47491,"epss_as_of":"2026-06-23","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.","published_at":"2023-03-16T18:33:52.907000Z","last_modified_at":null,"cvss_v3_score":9.8,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvss_v3_severity":"CRITICAL","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":"none","ssvc_automatable":true,"ssvc_technical_impact":"total","cwes":null,"nvd_references":["https://www.cisa.gov/news-events/ics-advisories/icsa-23-073-04"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-06-29T01:24:34.343180Z"},"effective_severity":"CRITICAL","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"H","value_label":"High"},{"metric":"I","name":"Integrity","value":"H","value_label":"High"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"aveva","vendor_name":"AVEVA","product_slug":"aveva-plant-scada","product_name":"AVEVA Plant SCADA","version_start":"2023 Update 10","version_start_inclusive":true,"version_end":"2023 Update 10","version_end_inclusive":true,"cpe23_uri":"cve5:aveva:aveva-plant-scada:2023 Update 10:2023 Update 10"},{"vendor_slug":"aveva","vendor_name":"AVEVA","product_slug":"aveva-plant-scada","product_name":"AVEVA Plant SCADA","version_start":"2020R2 Update 10","version_start_inclusive":true,"version_end":"2020R2 Update 10","version_end_inclusive":true,"cpe23_uri":"cve5:aveva:aveva-plant-scada:2020R2 Update 10:2020R2 Update 10"},{"vendor_slug":"aveva","vendor_name":"AVEVA","product_slug":"aveva-telemetry-server","product_name":"AVEVA Telemetry Server","version_start":"2020 R2 SP1","version_start_inclusive":true,"version_end":"2020 R2 SP1","version_end_inclusive":true,"cpe23_uri":"cve5:aveva:aveva-telemetry-server:2020 R2 SP1:2020 R2 SP1"}],"exploit_refs":[],"news":[],"references":[{"url":"https://www.cisa.gov/news-events/ics-advisories/icsa-23-073-04","source_type":"VENDOR_ADVISORY","tags":["advisory"]}],"timeline":[{"type":"published","at":"2023-03-16T18:33:52.907000Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:25:43.631349Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:25:43.631349Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:25:43.631349Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"ssvc_changed","at":"2026-06-29T01:24:34.343180Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-29T01:24:34.343180Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-29T01:24:34.343180Z","label":"SSVC decision revised","source":"vulnrichment"}]}