6.8

CVE-2020-1173: microsoft power_bi_report_server Improper Input Validation

CVSS: 6.8v3.1MediumModified
Published 21-05-2020Last modified 19-08-2026
Open JSON

Vulnerability summary

CVE-2020-1173 is a medium (CVSS 6.8) Improper Input Validation vulnerability in microsoft power_bi_report_server. EPSS estimates a 2.48% chance of exploitation in the next 30 days, higher than 84.3% of scored vulnerabilities.

Overall risk
28/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.8/10
010
Medium · v3.1 (NVD)
EPSS score
2.48%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 21-05-2020
    PublishedVulnerability first disclosed.
  2. 19-08-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

2.48%

Chance of exploitation in the next 30 days

Percentile

84%

Versus all other CVEs

30-day change

+0.02 pp

From 2.46% on 19-09-2026

19-09-202619-10-2026
EPSS score
2.48%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Microsoft1 product

1 vendor · 1 product

References

2 links