CVE-2021-41372
HighCVSS 7.6Exploitation Probability (EPSS)
Low risk47th percentile - higher than 47% of all known CVEs
Summary
W Power BI Report Server występuje podatność na Cross-Site Scripting (XSS) oraz Cross-Site Request Forgery (CSRF), która pozwala atakującemu na przesłanie złośliwych plików szablonów Power BI (pbix) zawierających pliki HTML. Po dostępie ofiary do tych plików, atakujący może uruchomić skrypty w kontekście bezpieczeństwa użytkownika, co może prowadzić do eskalacji uprawnień, jeśli ofiara ma uprawnienia administratora.
Risk Assessment
Organizacja narażona jest na ryzyko przejęcia sesji użytkownika oraz eskalacji uprawnień, co może prowadzić do nieautoryzowanego dostępu do danych i zasobów systemowych. W przypadku administratorów, skutki mogą być szczególnie poważne, prowadząc do pełnej kontroli nad systemem.
Recommendation
Zaleca się wdrożenie aktualizacji zabezpieczeń, która zapewnia odpowiednie oczyszczanie przesyłanych plików w Power BI Report Server. Dodatkowo, warto wprowadzić dodatkowe kontrole dostępu do przesyłanych plików oraz monitorować aktywność użytkowników.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

