What’s Vulnerable › Vulnerabilities

CVE-2021-37866: Session is not invalidated on server-side when user logged out of Boards

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-01-18 · updated 2026-06-17
• Weakness: CWE-613

Description

Mattermost Boards plugin v0.10.0 and earlier fails to invalidate a session on the server-side when a user logged out of Boards, which allows an attacker to reuse old session token for authorization.

Affected products

• Mattermost Boards: through 0.10.0

References

• https://mattermost.com/security-updates/
• https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-37866
• https://mattermost.com/security-updates/
• https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-37866

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