Mattermost up to 10.5.12/10.11.4 missing authentication

CVSS Meta Temp Score
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CTI Interest Score
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3.5$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Mattermost up to 10.5.12/10.11.4. This affects an unknown function. Such manipulation leads to missing authentication. This vulnerability is traded as CVE-2025-13870. The attack may be launched remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Mattermost up to 10.5.12/10.11.4. It has been rated as problematic. Affected by this issue is an unknown functionality. The manipulation with an unknown input leads to a missing authentication vulnerability. Using CWE to declare the problem leads to CWE-306. The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. Impacted is confidentiality. CVE summarizes:

Mattermost versions 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to validate the user permission when accessing the files and subscribing to the block in Boards, which allows an authenticated user to access other board files and was able to subscribe to the block from other boards that the user does not have access to

The weakness was shared by Doyensec. The advisory is available at mattermost.com. This vulnerability is handled as CVE-2025-13870 since 12/02/2025. The exploitation is known to be difficult. The attack may be launched remotely. The technical details are unknown and an exploit is not available.

The vulnerability scanner Nessus provides a plugin with the ID 278111 (Mattermost Server 10.5.x <= 10.5.12 / 10.11.x <= 10.11.4 Improper Access Control (MMSA-2025-00517)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 10.5.13, 10.11.5 or 11.1.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (278111) and CERT Bund (WID-SEC-2025-2715). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Mattermost Mattermost

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.5
VulDB Meta Temp Score: 3.5

VulDB Base Score: 3.1
VulDB Temp Score: 3.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 4.3
NVD Vector: 🔒

CNA Base Score: 3.1
CNA Vector (Mattermost): 🔒

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Missing authentication
CWE: CWE-306 / CWE-287
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 278111
Nessus Name: Mattermost Server 10.5.x <= 10.5.12 / 10.11.x <= 10.11.4 Improper Access Control (MMSA-2025-00517)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Mattermost 10.5.13/10.11.5/11.1.0

Timelineinfo

12/02/2025 Advisory disclosed
12/02/2025 +0 days CVE reserved
12/02/2025 +0 days VulDB entry created
12/11/2025 +9 days VulDB entry last update

Sourcesinfo

Advisory: mattermost.com
Researcher: Doyensec
Status: Confirmed

CVE: CVE-2025-13870 (🔒)
GCVE (CVE): GCVE-0-2025-13870
GCVE (VulDB): GCVE-100-334034
CERT Bund: WID-SEC-2025-2715 - Mattermost Server: Schwachstelle erm&ouml;glicht Offenlegung von Informationen

Entryinfo

Created: 12/02/2025 11:09
Updated: 12/11/2025 01:49
Changes: 12/02/2025 11:09 (64), 12/02/2025 14:40 (7), 12/04/2025 08:59 (11), 12/11/2025 01:49 (2)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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