{"cve":"CVE-2020-1173","nvd":{"published":"2020-05-21T23:15:17.960","modified":"2026-08-19T17:17:28.987","status":"Modified","description":"A spoofing vulnerability exists in Microsoft Power BI Report Server in the way it validates the content-type of uploaded attachments. An authenticated attacker could exploit the vulnerability by uploading a specially crafted payload and sending it to the user.\nThe attacker who successfully exploited this vulnerability could then perform actions and run scripts in the security context of the user.\nThis security update addresses the vulnerability by ensuring Power BI Report Server properly validates content-type of the attachments when uploading and opening.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N","score":6.8},"cwes":["CWE-20"],"references":["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1173","https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1173"],"products":["microsoft:power_bi_report_server"],"source":"nvd","synced_at":"2026-10-19T21:05:42.039641217+00:00"},"epss":{"cve":"CVE-2020-1173","score":0.02482,"percentile":0.84587,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}