# CVE-2021-41372: Power BI Report Server Spoofing Vulnerability

CVE-2021-41372 is fixed in 2 products on 1 platform, first by KB5007903, released November 9, 2021. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2021-41372
- Priority: High
- CVSS: 7.6 (Important)
- EPSS: 0.0068
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Nov 9, 2021
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-41372

## Description

<p>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.</p> <p>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.</p> <p>The security update addresses the vulnerability by helping to ensure that Power BI Report Server properly sanitize file uploads.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Power BI Report Server version 1.11.8091.10468 |  | [KB5007903](https://patchblox.com/security/data/fix/microsoft/kb5007903.md) | Nov 9, 2021 |
| Microsoft | Power BI Report Server version 1.12.7977.29537 |  | [KB5007903](https://patchblox.com/security/data/fix/microsoft/kb5007903.md) | Nov 9, 2021 |

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Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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