CVE-2015-6117
MediumCVSS 6.1Exploitation Probability (EPSS)
Very high risk94th percentile - higher than 94% of all known CVEs
Summary
Microsoft SharePoint Server 2013 SP1 and SharePoint Foundation 2013 SP1 allow remote authenticated users to bypass intended Access Control Policy restrictions and conduct cross-site scripting (XSS) attacks by modifying a webpart. This is known as "Microsoft SharePoint Security Feature Bypass" and is different from CVE-2016-0011.
Risk Assessment
An authenticated attacker can execute malicious script in other users' browsers, potentially leading to session or data theft. Bypassing access control policies weakens SharePoint security mechanisms.
Recommendation
Apply the appropriate Microsoft security updates for SharePoint Server 2013 SP1 and SharePoint Foundation 2013 SP1. Restrict webpart modification permissions to trusted users.
Other vulnerabilities in Microsoft SharePoint
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- CVE-2020-1102High
Remote code execution vulnerability in Microsoft SharePoint when the software fails to check the source markup of an application package. An attacker could run arbitrary code in the context of the SharePoint application pool and the SharePoint server farm account.
- CVE-2020-1024High
A remote code execution vulnerability in Microsoft SharePoint due to failure to check the source markup of application packages. An attacker could exploit it by uploading a specially crafted SharePoint application package. The update corrects how SharePoint checks source markup.
- CVE-2020-1023High
A remote code execution vulnerability in Microsoft SharePoint due to failure to check the source markup of application packages. An attacker could exploit it by uploading a specially crafted SharePoint application package. The update corrects how SharePoint checks source markup.
- CVE-2019-0604CriticalActively exploited
Microsoft SharePoint has a remote code execution vulnerability when the software fails to check the source markup of an application package, aka 'Microsoft SharePoint Remote Code Execution Vulnerability'.
Original NVD description (English source)
Microsoft SharePoint Server 2013 SP1 and SharePoint Foundation 2013 SP1 allow remote authenticated users to bypass intended Access Control Policy restrictions and conduct cross-site scripting (XSS) attacks by modifying a webpart, aka "Microsoft SharePoint Security Feature Bypass," a different vulnerability than CVE-2016-0011.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS