Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2020-1173

CVE-2020-1173MEDIUM

Microsoft Power BI Report Server Spoofing Vulnerability

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   L   R  C  N  H  N    6.8   .0246   83.9     —

AFFECTED
  Product                 Versions  Fixed
  Power BI Report Server  1.6.0 –   —

TIMELINE
  Nov 4   Reserved by microsoft
  May 21  Published (CNA: microsoft)
  Aug 19  ENRICHED — CVE-2020-1173 (Microsoft Power BI Report Server). Received CVSS 6.8 and CPE data from NVD.

CWE-20 · CNA: microsoft · CVSS v3.1 · 2 references · NVD 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. The attacker who successfully exploited this vulnerability could then perform actions and run scripts in the security context of the user. This security update addresses the vulnerability by ensuring Power BI Report Server properly validates content-type of the attachments when uploading and opening.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
November 4, 2019	Reserved	Reserved by microsoft
May 21, 2020	Published	Published (CNA: microsoft)
August 19, 2026	ENRICHED	ENRICHED — CVE-2020-1173 (Microsoft Power BI Report Server). Received CVSS 6.8 and CPE data from NVD.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Microsoft	Power BI Report Server	—	1.6.0	—

Weaknesses

CWE-20

References (2)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1173
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1173 [Patch, Vendor Advisory]

Authoritative record: CVE-2020-1173 at cve.org

Vendors: microsoft

Weaknesses: CWE-20

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2020-1173 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.