CVE-2023-4478

Parameter tampering in the registration resulting in blocked accounts to be created

Published Aug 25, 2023 CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Description
Mattermost fails to restrict which parameters' values it takes from the request during signup allowing an attacker to register users as inactive, thus blocking them from later accessing Mattermost without the system admin activating their accounts.

Remediation

Vendor Solution

Update Mattermost Server to versions 7.8.9, 7.10.5, 8.0.1 or higher.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2023-54333 Mattermost fails to restrict which parameters' values it takes from the request during signup allowing an attacker to register users as inactive, thus blocking them from later accessing Mattermost without the system admin activating their accounts.
References
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Mattermost
Published
Updated
Sep 30, 2024, 6:17 PM
Reserved
Aug 22, 2023, 11:45 AM
Status
Modified
Published
Aug 25, 2023, 10:15 AM
Modified
Jun 17, 2026, 6:37 AM