Mattermost up to 10.5.11/10.11.3/10.12.0 member information disclosure

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 categorized as problematic has been discovered in Mattermost up to 10.5.11/10.11.3/10.12.0. This affects an unknown part of the file /api/v4/users/{user_id}/email/verify/member. The manipulation results in information disclosure. This vulnerability is identified as CVE-2025-11794. The attack can be executed remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Mattermost up to 10.5.11/10.11.3/10.12.0. It has been classified as problematic. Affected is an unknown functionality of the file /api/v4/users/{user_id}/email/verify/member. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. CVE summarizes:

Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11, 10.12.x <= 10.12.0 fail to sanitize user data which allows system administrators to access password hashes and MFA secrets via the POST /api/v4/users/{user_id}/email/verify/member endpoint

The weakness was released by Christian Iwata Nilsson. The advisory is available at mattermost.com. This vulnerability is traded as CVE-2025-11794 since 10/15/2025. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation needs additional levels of successful authentication. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1592 by the MITRE ATT&CK project.

Upgrading to version 10.5.12, 10.11.4, 10.12.1 or 11.0.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at EUVD (EUVD-2025-197607) and CERT Bund (WID-SEC-2025-2315). 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: 3.6
VulDB Meta Temp Score: 3.5

VulDB Base Score: 2.2
VulDB Temp Score: 2.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 4.9
CNA Vector (Mattermost): 🔒

CVSSv2info

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

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / 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 10.5.12/10.11.4/10.12.1/11.0.0

Timelineinfo

10/15/2025 CVE reserved
11/14/2025 +30 days Advisory disclosed
11/14/2025 +0 days VulDB entry created
11/28/2025 +14 days VulDB entry last update

Sourcesinfo

Advisory: mattermost.com
Researcher: Christian Iwata Nilsson
Status: Confirmed

CVE: CVE-2025-11794 (🔒)
GCVE (CVE): GCVE-0-2025-11794
GCVE (VulDB): GCVE-100-332466
EUVD: 🔒
CERT Bund: WID-SEC-2025-2315 - Mattermost Server und Mobile: Mehrere Schwachstellen

Entryinfo

Created: 11/14/2025 12:03
Updated: 11/28/2025 16:14
Changes: 11/14/2025 12:03 (65), 11/14/2025 16:29 (1), 11/19/2025 02:02 (7), 11/28/2025 16:14 (1)
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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