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CVE-2020-10146

Microsoft Teams displayName stored cross-site scripting vulnerability

MEDIUM
5.4
CVSS Score
Published: December 9, 2020 at 12:30 AM UTC
Updated: June 17, 2026 at 02:47 AM UTC
1 product affected across 1 vendorTeams

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Severity
MEDIUM5.4
Exploit prediction
EPSS 2%

Description

The Microsoft Teams online service contains a stored cross-site scripting vulnerability in the displayName parameter that can be exploited on Teams clients to obtain sensitive information such as authentication tokens and to possibly execute arbitrary commands. This vulnerability was fixed for all Teams users in the online service on or around October 2020.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Teams· Microsoft
95%
v < 2020-10-29v < on or about October 2020
Affected range stops below 2020-10-29, so it looks safe — our inference, not a vendor statement
Affected range stops below on or about October 2020, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://github.com/oskarsve/ms-teams-rce

CVSS

5.4MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-79

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