What is the CVSS score of CVE-2026-3117?

CVE-2026-3117 has a CVSS 3.1 base score of 6.5 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.0%.

Mattermost Plugins CVE-2026-3117

Q: Which versions of Mattermost Plugins are affected by CVE-2026-3117?

{option}` or `/gitlab webhook {option}`, resulting in availability impact (A:H) to the Gitlab plugin infrastructure.

EUVD-2026-30748 MEDIUM

Missing Authorization (CWE-862)

2026-05-18 Mattermost

GHSA-5gjv-5xhr-vc35

Authentication Bypass Gitlab Mattermost

6.5

CVSS 3.1

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Analysis Generated

May 18, 2026 - 09:32 vuln.today

DescriptionNVD

Mattermost Plugins versions <=11.5 11.1.5 10.13.11 11.3.4.0 fail to properly check for permissions when processing commands in the Gitlab plugin which allows normal users to uninstall instances or setup webhook connections via the {{gitlab instance {option}}} or the {{/gitlab webhook {option}}} commands. Mattermost Advisory ID: MMSA-2026-00600

AnalysisAI

{option} or /gitlab webhook {option}, resulting in availability impact (A:H) to the Gitlab plugin infrastructure. CVSS 6.5 reflects moderate risk, with EPSS data and active exploitation status not available at time of analysis.

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

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CVE-2026-3117 vulnerability details – vuln.today

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Mattermost Plugins CVE-2026-3117

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

AnalysisAI

Full analysis requires sign-in

More from same product – last 7 days

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External POC / Exploit Code