{"id":"CVE-2020-1025","aliases":["EUVD-2020-11921","GHSA-5xrx-pfvm-p5p8"],"status":"published","title":"Microsoft Office Elevation of Privilege Vulnerability","description":"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.\nTo exploit this vulnerability, an attacker would need to modify the token.\nThe update addresses the vulnerability by modifying how Microsoft SharePoint Server and Skype for Business Server validate tokens.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.05853,"percentile":0.9324,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-20","CWE-269"],"published":"2020-07-14T22:53:56Z","modified":"2026-06-17T03:00:15Z","products":[{"vendor":"microsoft","product":"lync"},{"vendor":"microsoft","product":"microsoft lync server 2013"},{"vendor":"microsoft","product":"microsoft sharepoint enterprise server 2016"},{"vendor":"microsoft","product":"microsoft sharepoint foundation 2013 service pack 1"},{"vendor":"microsoft","product":"microsoft sharepoint server 2019"},{"vendor":"microsoft","product":"sharepoint_enterprise_server"},{"vendor":"microsoft","product":"sharepoint_foundation"},{"vendor":"microsoft","product":"sharepoint_server"},{"vendor":"microsoft","product":"skype for business server 2015 cu 8"},{"vendor":"microsoft","product":"skype for business server 2019  cu2"},{"vendor":"microsoft","product":"skype_for_business"}],"references":[{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1025","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-1025"},{"url":"https://github.com/advisories/GHSA-5xrx-pfvm-p5p8"}],"sources":{"cve":[{"id":"CVE-2020-1025","title":"Microsoft Office Elevation of Privilege Vulnerability","description":"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.\nTo exploit this vulnerability, an attacker would need to modify the token.\nThe update addresses the vulnerability by modifying how Microsoft SharePoint Server and Skype for Business Server validate tokens.","status":"published","published":"2020-07-14T22:53:56Z","modified":"2024-08-04T06:24:59.514Z","updated_at":"2026-11-02T14:35:56.213477Z"}],"euvd":[{"id":"EUVD-2020-11921","description":"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.\nTo exploit this vulnerability, an attacker would need to modify the token.\nThe update addresses the vulnerability by modifying how Microsoft SharePoint Server and Skype for Business Server validate tokens.","status":"published","published":"2020-07-14T22:53:56Z","modified":"2024-08-04T06:24:59Z","updated_at":"2026-11-03T03:08:15.605178Z"}],"ghsa":[{"id":"GHSA-5xrx-pfvm-p5p8","title":"An elevation of privilege vulnerability exists when Microsoft SharePoint Server and Skype for...","description":"An elevation of privilege vulnerability exists when Microsoft SharePoint Server and Skype for Business Server improperly handle OAuth token validation, aka 'Microsoft Office Elevation of Privilege Vulnerability'.","status":"published","published":"2022-05-24T17:22:56Z","modified":"2024-01-18T05:06:46Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-20","CWE-269"],"updated_at":"2026-11-02T14:55:26.812198Z"}],"nvd":[{"id":"CVE-2020-1025","description":"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.\nTo exploit this vulnerability, an attacker would need to modify the token.\nThe update addresses the vulnerability by modifying how Microsoft SharePoint Server and Skype for Business Server validate tokens.","status":"published","published":"2020-07-14T23:15:11.447Z","modified":"2026-06-17T03:00:15Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:06:09.126752Z"}]}}