CVE-2021-41372
Plain English Summary
AI-powered analysis for quick understanding
An attacker can upload a malicious Power BI template that includes harmful HTML files, which can then execute scripts in the context of a user’s session, potentially allowing the attacker to gain higher privileges if the victim has admin rights. This requires the victim to be tricked into accessing the malicious HTML files while logged into the Power BI Report Server.
Technical Description
A Cross-Site Scripting (XSS) and Cross-Site Request Forgery (CSRF) vulnerability exists when Power BI Report Server Template file (pbix) containing HTML files is uploaded to the server and HTML files are accessed directly by the victim. Combining these 2 vulnerabilities together, an attacker is able to upload malicious Power BI templates files to the server using the victim's session and run scripts in the security context of the user and perform privilege escalation in case the victim has admin privileges when the victim access one of the HTML files present in the malicious Power BI template uploaded. The security update addresses the vulnerability by helping to ensure that Power BI Report Server properly sanitize file uploads.
CVSS Vector Analysis
Vector String
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:NExploit Resources
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Official References
Quick Information
Published
Nov 10, 2021
over 4 years ago
Last Modified
Feb 24, 2026
about 1 month ago
Vendor
microsoft
Product
power bi report server
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