Mattermost up to 9.11.9/10.4.3/10.5.1 Archived Channel authorization

CVSS Meta Temp Score
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CTI Interest Score
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4.2$0-$5k0.00

Summaryinfo

A vulnerability was found in Mattermost up to 9.11.9/10.4.3/10.5.1 and classified as problematic. This impacts an unknown function of the component Archived Channel Handler. Such manipulation leads to authorization. This vulnerability is traded as CVE-2025-2564. The attack may be launched remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Mattermost up to 9.11.9/10.4.3/10.5.1 and classified as problematic. Affected by this issue is an unknown code of the component Archived Channel Handler. The manipulation with an unknown input leads to a authorization vulnerability. Using CWE to declare the problem leads to CWE-863. The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions. Impacted is confidentiality. CVE summarizes:

Mattermost versions 10.5.x <= 10.5.1, 10.4.x <= 10.4.3, 9.11.x <= 9.11.9 fail to properly enforce the 'Allow users to view/update archived channels' System Console setting, which allows authenticated users to view members and member information of archived channels even when this setting is disabled.

The weakness was shared by hackit_bharat. The advisory is shared for download at mattermost.com. This vulnerability is handled as CVE-2025-2564 since 03/20/2025. The exploitation is known to be easy. The attack may be launched remotely. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 234793 (Mattermost Server 9.11.x < 9.11.10 / 10.4.x < 10.4.4 / 10.5.x < 10.5.2 / 10.6.0 (MMSA-2025-00436)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 9.11.10, 10.4.4, 10.5.2 or 10.6.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (234793). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.2

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 4.3
CNA Vector (Mattermost): 🔍

CVSSv2info

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

Exploitinginfo

Class: Authorization
CWE: CWE-863 / CWE-285 / CWE-266
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: 234793
Nessus Name: Mattermost Server 9.11.x < 9.11.10 / 10.4.x < 10.4.4 / 10.5.x < 10.5.2 / 10.6.0 (MMSA-2025-00436)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Mattermost 9.11.10/10.4.4/10.5.2/10.6.0

Timelineinfo

03/20/2025 🔍
04/16/2025 +26 days 🔍
04/16/2025 +0 days 🔍
09/30/2025 +166 days 🔍

Sourcesinfo

Advisory: mattermost.com
Researcher: hackit_bharat
Status: Confirmed

CVE: CVE-2025-2564 (🔍)
GCVE (CVE): GCVE-0-2025-2564
GCVE (VulDB): GCVE-100-305204

Entryinfo

Created: 04/16/2025 18:42
Updated: 09/30/2025 00:18
Changes: 04/16/2025 18:42 (64), 04/24/2025 22:00 (2), 09/30/2025 00:18 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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