CVE-2021-41372 Power BI Report Server Spoofing Vulnerability
Attackers can upload malicious templates to execute scripts and escalate privileges via XSS and CSRF in Power BI Report Server.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-41372?
CVE-2021-41372 is a high-severity cross-site scripting vulnerability in Microsoft Power BI Report Server version 1.11.8091.10468, published on 10 Nov 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official 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.
Which versions are affected by CVE-2021-41372?
It affects 1 product.
Products include Microsoft Power Bi Report Server.
How do I fix CVE-2021-41372?
No fix has been published for CVE-2021-41372 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2021-41372 being exploited?
There is no known exploitation of CVE-2021-41372 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Power BI Report Server version 1.11.8091.10468
- CVE-2026-65811 Power BI Remote Code Execution Vulnerability
- CVE-2023-21806 Power BI Report Server Spoofing Vulnerability
- CVE-2026-58647 Microsoft PowerBI Report Server Spoofing Vulnerability
- CVE-2026-21229 Power BI Remote Code Execution Vulnerability
- CVE-2021-26859 Microsoft Power BI Information Disclosure Vulnerability
Sources
Also known as GHSA-3w9m-7j3j-w9p6.