CVE-2024-39836

Munged email address used for password resets and notifications

Published Aug 22, 2024 CVSS 3.1 · 4.8 Medium EPSS < 1% KEV · Not listed
Description
Mattermost versions 9.9.x <= 9.9.1, 9.5.x <= 9.5.7, 9.10.x <= 9.10.0 and 9.8.x <= 9.8.2 fail to ensure that remote/synthetic users cannot create sessions or reset passwords, which allows the munged email addresses, created by shared channels, to be used to receive email notifications and to reset passwords, when they are valid, functional emails.

Remediation

Vendor Solution

Update Mattermost to versions 9.11.0, 9.9.2, 9.5.8, 9.10.1, 9.8.3 or higher.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2024-2555 Mattermost versions 9.9.x <= 9.9.1, 9.5.x <= 9.5.7, 9.10.x <= 9.10.0 and 9.8.x <= 9.8.2 fail to ensure that remote/synthetic users cannot create sessions or reset passwords, which allows the munged email addresses, created by shared channels, to be used to receive email notifications and to reset passwords, when they are valid, functional emails.
Github GHSA Github GHSA GHSA-c6vp-jjgv-38wj Mattermost allows remote/synthetic users to create sessions, reset passwords
References
History
Type Values Removed Values Added
First Time appeared Mattermost
Mattermost mattermost
Weaknesses NVD-CWE-noinfo
CPEs cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*
Vendors & Products Mattermost
Mattermost mattermost
Type Values Removed Values Added
Metrics ssvc

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

Type Values Removed Values Added
Description Mattermost versions 9.9.x <= 9.9.1, 9.5.x <= 9.5.7, 9.10.x <= 9.10.0 and 9.8.x <= 9.8.2 fail to ensure that remote/synthetic users cannot create sessions or reset passwords, which allows the munged email addresses, created by shared channels, to be used to receive email notifications and to reset passwords, when they are valid, functional emails.
Title Munged email address used for password resets and notifications
Weaknesses CWE-693
References
Metrics cvssV3_1

{'score': 4.8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Mattermost
Published
Updated
Aug 22, 2024, 4:39 PM
Reserved
Aug 20, 2024, 4:09 PM
Status
Analyzed
Published
Aug 22, 2024, 7:15 AM
Modified
Jun 17, 2026, 7:42 AM