Mattermost up to 9.11.17/10.5.8/10.8.3/10.9.1 Plugin Import path traversal

CVSS Meta Temp Score
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CTI Interest Score
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4.7$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Mattermost up to 9.11.17/10.5.8/10.8.3/10.9.1. The impacted element is an unknown function of the component Plugin Import. The manipulation leads to path traversal. This vulnerability is documented as CVE-2025-36530. The attack can be initiated remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Mattermost up to 9.11.17/10.5.8/10.8.3/10.9.1. It has been rated as problematic. This issue affects some unknown processing of the component Plugin Import. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality. The summary by CVE is:

Mattermost versions 10.9.x <= 10.9.1, 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17 fail to properly validate file paths during plugin import operations which allows restricted admin users to install unauthorized custom plugins via path traversal in the import functionality, bypassing plugin signature enforcement and marketplace restrictions.

The weakness was released by Dawid Kulikowski. The advisory is shared at mattermost.com. The identification of this vulnerability is CVE-2025-36530 since 07/22/2025. The exploitation is known to be easy. The attack may be initiated remotely. The exploitation needs additional levels of successful authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1006 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 258075 (Mattermost Server 9.11.x < 9.11.18 / 10.5.x < 10.5.9 / 10.8.x < 10.8.4 / 10.9.x < 10.9.2 / 10.10.0 (MMSA-2025-00500)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 9.11.18, 10.5.9, 10.8.4, 10.9.2 or 10.10.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (258075) and CERT Bund (WID-SEC-2025-1625). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

  • Mattermost Mattermost

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.7
VulDB Meta Temp Score: 4.7

VulDB Base Score: 2.7
VulDB Temp Score: 2.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.8
CNA Vector (Mattermost): 🔒

CVSSv2info

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

Exploitinginfo

Class: Path traversal
CWE: CWE-22
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: 258075
Nessus Name: Mattermost Server 9.11.x < 9.11.18 / 10.5.x < 10.5.9 / 10.8.x < 10.8.4 / 10.9.x < 10.9.2 / 10.10.0 (MMSA-2025-00500)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Mattermost 9.11.18/10.5.9/10.8.4/10.9.2/10.10.0

Timelineinfo

07/22/2025 CVE reserved
08/21/2025 +30 days Advisory disclosed
08/21/2025 +0 days VulDB entry created
08/29/2025 +8 days VulDB entry last update

Sourcesinfo

Advisory: mattermost.com
Researcher: Dawid Kulikowski
Status: Confirmed

CVE: CVE-2025-36530 (🔒)
GCVE (CVE): GCVE-0-2025-36530
GCVE (VulDB): GCVE-100-320921
CERT Bund: WID-SEC-2025-1625 - Mattermost Server und Plugins: Mehrere Schwachstellen

Entryinfo

Created: 08/21/2025 11:42
Updated: 08/29/2025 04:44
Changes: 08/21/2025 11:42 (65), 08/21/2025 12:33 (7), 08/21/2025 14:29 (1), 08/29/2025 04:44 (2)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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