CVE-2020-1345
HighSummary
W Microsoft SharePoint Server występuje podatność na atak typu cross-site scripting (XSS), gdy serwer nieprawidłowo oczyszcza specjalnie przygotowane żądanie webowe. Uwierzytelniony atakujący może wykorzystać tę podatność, wysyłając takie żądanie do podatnego serwera SharePoint.
Risk Assessment
Atakujący, który pomyślnie wykorzysta tę podatność, może przeprowadzać ataki XSS na podatnych systemach, co pozwala mu na odczytanie treści, do których nie ma uprawnień, oraz na działania w imieniu ofiary, takie jak zmiana uprawnień czy usuwanie treści.
Recommendation
Zaleca się zastosowanie aktualizacji zabezpieczeń, która zapewnia prawidłowe oczyszczanie żądań webowych przez SharePoint Server.
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Original NVD description (English source)
<p>A cross-site-scripting (XSS) vulnerability exists when Microsoft SharePoint Server does not properly sanitize a specially crafted web request to an affected SharePoint server. An authenticated attacker could exploit the vulnerability by sending a specially crafted request to an affected SharePoint server.</p> <p>The attacker who successfully exploited the vulnerability could then perform cross-site scripting attacks on affected systems and run script in the security context of the current user. The attacks could allow the attacker to read content that the attacker is not authorized to read, use the victim's identity to take actions on the SharePoint site on behalf of the user, such as change permissions and delete content, and inject malicious content in the browser of the user.</p> <p>The security update addresses the vulnerability by helping to ensure that SharePoint Server properly sanitizes web requests.</p>
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

