| パッケージ | 影響を受けるバージョン | 修正済みバージョン |
|---|---|---|
| lync | = 2013 | |
| sharepoint enterprise server | = 2016 | |
| sharepoint foundation | = 2013 | |
| sharepoint server | = 2019 | |
| skype for business | = 2015= 2019 |
An elevation of privilege vulnerability exists when Microsoft SharePoint Server and Skype for Business Server improperly handle OAuth token validation. An attacker who successfully exploited the vulnerability could bypass authentication and achieve improper access. To exploit this vulnerability, an attacker would need to modify the token. The update addresses the vulnerability by modifying how Microsoft SharePoint Server and Skype for Business Server validate tokens.
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