What is the CVSS score of CVE-2025-47871?

CVE-2025-47871 has a CVSS 3.1 base score of 4.3 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N. EPSS exploitation probability: 0.0%.

How to fix or mitigate CVE-2025-47871?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Mattermost CVE-2025-47871

Q: Which versions of Mattermost are affected by CVE-2025-47871?

CVE-2025-47871 presents moderate security risk, a incorrect authorization vulnerability rated CVSS 4.3. Attackers could gain access beyond their authorized level.. A patch is available.

EUVD-2025-19558 MEDIUM

Incorrect Authorization (CWE-863)

2025-06-30 responsibledisclosure@mattermost.com

GHSA-wgvp-jj4w-88hf

Authentication Bypass Debian Mattermost Mattermost Server Suse

4.3

CVSS 3.1 · NVD

View

Vulnerability Assessment

Weakness	CWE CWE-863 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. Sign in to read
Impact	Exposed information (credentials, internal paths, user data, configuration) can be leveraged for further attacks or regulatory violations. With a CVSS score of 4.3 (MEDIUM), this represents a moderate risk.
Exploit ScenarioDerived	An attacker triggers error conditions or accesses improperly protected endpoints to extract sensitive internal information from the application.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

Patch available 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 16, 2026

Mattermost versions 10.5.x <= 10.5.5, 9.11.x <= 9.11.15, 10.8.x <= 10.8.0, 10.7.x <= 10.7.2, 10.6.x <= 10.6.5 fail to properly validate channel membership when retrieving playbook run metadata, allowing authenticated users who are playbook members but not channel members to access sensitive information about linked private channels including channel name, display name, and participant count through the run metadata API endpoint.

Earlier versions of this analysis (1)

v1 Mar 16, 2026 - 01:25 CVSS 4.3

RemediationAI

Implement proper access controls. Sanitize error messages in production. Review logging practices to avoid capturing sensitive data.

Affected VersionsENISA

Mattermost 10.7.0 ≤10.7.2

Mattermost 9.11.0 ≤9.11.15

Mattermost 10.8.0

Mattermost 10.5.0 ≤10.5.5

Mattermost 10.6.0 ≤10.6.5

Affected Packages

go github.com/mattermost/mattermost-server fix: 0.0.0-20250513065225-4ae5d647fb88, 9.11.16+incompatible, 10.5.6+incompatible, 10.6.6+incompatible, 10.7.3+incompatible, 10.8.1+incompatible

go github.com/mattermost/mattermost-server/v5 no fix

go github.com/mattermost/mattermost-server/v6 no fix

go github.com/mattermost/mattermost/server/v8 fix: 8.0.0-20250513065225-4ae5d647fb88, 9.11.16, 10.5.6, 10.6.6, 10.7.3, 10.8.1

euvd mattermost no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 5 packages in go, euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Information disclosure occurs when an application inadvertently reveals sensitive data to unauthorized actors through error messages, logs, or improper access controls. This vulnerability is classified as Incorrect Authorization (CWE-863).

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 4.3 MEDIUM

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

SUSE MEDIUM

Primary rating from NVD.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Lifecycle Timeline

Patch released

Mar 31, 2026 - 21:13 nvd

Patch available

CVE Published

Jun 30, 2025 - 17:15 nvd

MEDIUM 4.3

Executive ViewAI

Why It Matters

CVE-2025-47871 presents moderate security risk, a incorrect authorization vulnerability rated CVSS 4.3. Attackers could gain access beyond their authorized level. Organizations should apply vendor updates when available and monitor for exploitation.

Business Impact: Low

Compensating Controls

Apply vendor patch. If patching is delayed: restrict network access and enable monitoring.

Threat Intelligence Overview

EPSS Score

0.0%

Top 86% exploitable

Data Quality

6 sources

Confidence: High

EUVD

NVD

CVE.org

EPSS Vendor

GitHub

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.

SignalValue

Severity MEDIUM

CISA KEV No

Public POC No

EPSS 0.0%

Patch available Yes

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Defer

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Human Impact

Low

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +22

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Authentication Bypass CRITICAL

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

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6.1

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8.8

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7.3

CVE-2025-21480 HIGH

8.6

CVE-2025-21479 HIGH

8.6

CVE-2025-32462 HIGH POC

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CVE-2015-3306 CRITICAL POC

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CVE-2023-22515 CRITICAL POC

9.8

CVE-2012-4681 CRITICAL POC

9.8

CVE-2013-2465 CRITICAL POC

9.8

CVE-2011-3544 CRITICAL POC

9.8

CVE-2022-40684 CRITICAL POC

9.8

CVE-2025-61882 CRITICAL POC

9.8

CVE-2024-0012 CRITICAL POC

9.3

Vendor StatusVendor

Debian

Bug #823556

mattermost-server

Release	Status	Fixed Version	Urgency
	open	-	-

SUSE

Severity: Medium

Product	Status
SUSE Linux Enterprise Server 16.0	Fixed
openSUSE Tumbleweed	Fixed

References

Advisories & patches

ADVISORY https://github.com/mattermost/mattermost ADVISORY https://mattermost.com/security-updates ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2025-47871

Search Externally

GitHub PoC

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