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ReviewCritical

CVE-2021-41372

Microsoft Power BI Report Server version 1.11.8091.10468, Power BI Report Server version 1.12.7977.29537, power bi report server

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 templa...

CVSS
9.6
EPSS
0.64%
48.2% percentile
CISA KEV
Not listed
Published
2021.11.10
PRIORITY ASSESSMENT

Review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.64%
Technical severityCVSS 9.6

Vulnerability overview

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 templa...

Affected product and versions

Product
Microsoft Power BI Report Server version 1.11.8091.10468, Power BI Report Server version 1.12.7977.29537, power bi report server
Affected versions
>= 1.0.0.0 < 1.11.8091.10468, >= 1.0.0.0 < 1.12.7977.29537, 15.0.1107.165
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Microsoft Power BI Report Server version 1.11.8091.10468, Power BI Report Server version 1.12.7977.29537, power bi report server and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
CWE
CWE-352, CWE-79