Mattermost up to 10.x Archived Channel Setting authorization

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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3.5$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in Mattermost up to 10.x. The impacted element is an unknown function of the component Archived Channel Setting Handler. The manipulation results in authorization. This vulnerability is known as CVE-2025-41436. It is possible to launch the attack remotely. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in Mattermost up to 10.x. Affected is some unknown functionality of the component Archived Channel Setting Handler. The manipulation with an unknown input leads to a authorization vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality. CVE summarizes:

Mattermost versions <11.0 fail to properly enforce the "Allow users to view archived channels" setting which allows regular users to access archived channel content and files via the "Open in Channel" functionality from followed threads

The weakness was published by Bharat. The advisory is shared for download at mattermost.com. This vulnerability is traded as CVE-2025-41436 since 10/15/2025. The exploitability is told to be difficult. It is possible to launch the attack remotely. There are neither technical details nor an exploit publicly available.

Upgrading to version 11.0.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-186557). 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: 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: 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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Mattermost 11.0.0

Timelineinfo

10/15/2025 CVE reserved
11/14/2025 +30 days Advisory disclosed
11/14/2025 +0 days VulDB entry created
11/18/2025 +4 days VulDB entry last update

Sourcesinfo

Advisory: mattermost.com
Researcher: Bharat
Status: Confirmed

CVE: CVE-2025-41436 (🔒)
GCVE (CVE): GCVE-0-2025-41436
GCVE (VulDB): GCVE-100-332460
EUVD: 🔒

Entryinfo

Created: 11/14/2025 11:10
Updated: 11/18/2025 06:34
Changes: 11/14/2025 11:10 (64), 11/14/2025 17:43 (1), 11/18/2025 06:34 (11)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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