An elevation of privilege 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.
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. These 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.
The security update addresses the vulnerability by helping to ensure that SharePoint Server properly sanitizes web requests.
## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | Microsoft Project Server 2010 Service Pack 2 | | [KB4022210](https://patchblox.com/security/data/fix/microsoft/kb4022210.md) | Jun 12, 2018 | | Microsoft | Microsoft SharePoint Enterprise Server 2016 | | [KB4022173](https://patchblox.com/security/data/fix/microsoft/kb4022173.md) | Jun 12, 2018 | | Microsoft | Microsoft SharePoint Foundation 2013 Service Pack 1 | | [KB4022190](https://patchblox.com/security/data/fix/microsoft/kb4022190.md) | Jun 12, 2018 | --- Data as of 2026-11-07T12:40:37Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo