Stored XSS in Microsoft Office SharePoint
- Microsoft SharePoint Server 2019
Summary : Stored XSS in Microsoft Office SharePoint Date : June 2019 Affected versions : Microsoft SharePoint Server 2019 CVE reference : CVE-2019-1134
OverviewThe disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks. The vulnerability exists due to insufficient sanitization of user-supplied data. A remote authenticated attacker can permanently inject and execute arbitrary HTML and script code in user’s browser in context of vulnerable website. 
DescriptionA 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. 
ImpactSuccessful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
SolutionWe currently unaware of any official solution to address this vulnerability.
Reference https://www.cybersecurity-help.cz/vdb/SB2019062801  https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1134
CreditsSharepoint XSS vulnerability was reported by Huynh Phuoc Hung (@hph0var)
DisclaimerThe information provided herein is on “as is” basis, without warranty of any kind.