{"schemaVersion":3,"id":"CVE-2020-1044","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"<p>A security feature bypass vulnerability exists in SQL Server Reporting Services (SSRS) when the server improperly validates attachments uploaded to reports. An attacker who successfully exploited this vulnerability could upload file types that were disallowed by an administrator.</p>\n<p>To exploit the vulnerability, an authenticated attacker would need to send a specially crafted request to an affected SSRS server.</p>\n<p>The update addresses the vulnerability by modifying how SSRS validates attachment uploads.</p>","dates":{"published":"2020-09-11T17:08:54.000Z","modified":"2024-08-04T06:25:00.771Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":4.3,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":4.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":4.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":4,"severity":"medium","vector":"AV:N/AC:L/Au:S/C:N/I:P/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.01945,"percentile":0.7987,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.01945},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01945,"percentile":0.7987}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01945,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01945,"percentile":0.7987}]},"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-20","name":"Improper Input Validation","description":"The product receives input or data, but it does\n        not validate or incorrectly validates that the input has the\n        properties that are required to process the data safely and\n        correctly.","type":"weakness","status":"Stable","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/20.html"}],"affected":[{"vendor":"microsoft","product":"sql_server_2017_reporting_services","name":"sql server 2017 reporting services","label":"sql_server_2017_reporting_services","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 14.0.0, < publication","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 14.0.0, < publication","eol":null,"hubHref":"/vendor/microsoft/sql_server_2017_reporting_services"},{"vendor":"microsoft","product":"sql_server_2019_reporting_services","name":"sql server 2019 reporting services","label":"sql_server_2019_reporting_services","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 15.0.0, < publication","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 15.0.0, < publication","eol":null,"hubHref":"/vendor/microsoft/sql_server_2019_reporting_services"},{"vendor":"microsoft","product":"sql_server_reporting_services","name":"sql server reporting services","label":"sql_server_reporting_services","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"2017","noFixRecorded":false,"fixedIn":null},{"text":"2019","noFixRecorded":false,"fixedIn":null}],"versionsText":"2017 | 2019","eol":null,"hubHref":"/vendor/microsoft/sql_server_reporting_services"}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1044","label":"portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1044","hostname":"portal.msrc.microsoft.com","tags":["X Refsource MISC","Patch","Vendor Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2020-09-11T17:08:54.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-04T06:25:00.771Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":18,"level":"low","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T20:57:05.805Z","stale":false,"partial":false}}