CVE-2020-1173
MediumCVSS 6.8Exploitation Probability (EPSS)
High risk83th percentile - higher than 83% of all known CVEs
Summary
A spoofing vulnerability in Microsoft Power BI Report Server due to improper validation of uploaded attachment content-type. An authenticated attacker can upload a crafted payload, and when opened by a user, execute actions and scripts in the user's security context.
Risk Assessment
An attacker can take over a user's session and perform unauthorized actions in the system.
Recommendation
Install the security update that ensures proper validation of attachment content-type during upload and opening.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

