Reflected XSS in OAuth Flow
CVE-2021-37859

7.1HIGH

Key Information:

Vendor

Mattermost
Status
Mattermost
Vendor
CVE Published:
5 August 2021

What is CVE-2021-37859?

Fixed a bypass for a reflected cross-site scripting vulnerability affecting OAuth-enabled instances of Mattermost.

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Deploy the Patch

Affected Version(s)

Mattermost 5.32.0 <= 5.36.0

Mattermost 5.34.5

Mattermost 5.35.4

References

https://mattermost.com/security-updates/
x_refsource_MISC

EPSS Score

45% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
7.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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