CVE-2020-1173
Low
No strong exploitation signal.
CVSS base
6.8
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N
EPSS — probability of exploitation (30 days)
2.5%
83.7th percentile
CISA KEV
Not listed
Weakness / dates
CWE-20
Published 2020-05-21 · modified 2026-08-19
CVSS breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N
| Attack Vector | N | Network |
| Attack Complexity | L | Low |
| Privileges Required | L | Low |
| User Interaction | R | Required |
| Scope | C | Changed |
| Confidentiality | N | None |
| Integrity | H | High |
| Availability | N | None |
Timeline
- 2020-05-21 — Published (NVD)
- 2026-08-19 — Last modified (NVD)
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.