EUVD-2026-38248
GHSA-g5vr-6pgg-74qv
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Authorization logic validation
MITRE ATT&CK
1 technique across 1 tactic: Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
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Alert meAnalysisAIv1 – Jul 27, 2026
Insufficient authorization checks on the bot deactivation endpoint in Mattermost 11.7.x <= 11.7.0 and 10.11.x <= 10.11.17 permit a User Manager with write access to user management but without Integrations permissions to deactivate bot accounts via the PUT /api/v4/users/{id}/active API. An attacker with high privileges can disable bots, impacting availability and integrity of automated services. No known active exploitation or public exploit code is reported.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 2 packages in go, euvd
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
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Severity by source
AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L
Requires authenticated User Manager role with explicit write access (PR:H); no confidentiality loss; limited integrity and availability impact confined to bot account deactivation.
Primary rating from Vendor (Mattermost).
CVSS VectorVendor: Mattermost
DescriptionCVE.org
Mattermost versions 11.7.x <= 11.7.0, 10.11.x <= 10.11.17 fail to enforce bot-specific permission checks on the user active status endpoint, which allows a User Manager with user management write access but no Integrations access to deactivate bot accounts via the PUT /api/v4/users/{id}/active API endpoint.. Mattermost Advisory ID: MMSA-2026-00667
Threat Intelligence Overview
NVD
CVE.org
EPSS
Vulnrichment
VulDB
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.
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Exploit-DB