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CVE-2025-13321— Mattermost Desktop App logging sensitive information and fails to clear data on server deletion

Quick assessment

Affected
Mattermost Mattermost
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Mattermost Desktop App是美国Mattermost公司的一款消息传递桌面版应用程序。 Mattermost Desktop App 6.0.0之前版本存在安全漏洞，该漏洞源于未清理Mattermost日志中的敏感信息且服务器删除时未清除数据，可能导致通过读取应用程序日志访问敏感信息。

CVSS 3.3 · Low EPSS 0.12% · P2

Possible ATT&CK Techniques 1 AI

T1005 · Data from Local System
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I. Basic Information for CVE-2025-13321

Vulnerability Information
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Vulnerability Title
Mattermost Desktop App logging sensitive information and fails to clear data on server deletion
Source: CVE Program / CVE List V5
Vulnerability Description
Mattermost Desktop App versions <6.0.0 fail to sanitize sensitive information from Mattermost logs and clear data on server deletion which allows an attacker with access to the users system to gain access to potentially sensitive information via reading the application logs.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过日志文件的信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Mattermost Desktop App 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mattermost Desktop App是美国Mattermost公司的一款消息传递桌面版应用程序。 Mattermost Desktop App 6.0.0之前版本存在安全漏洞，该漏洞源于未清理Mattermost日志中的敏感信息且服务器删除时未清除数据，可能导致通过读取应用程序日志访问敏感信息。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Mattermost Mattermost 0 ~ 6.0.0 -

II. Public POCs for CVE-2025-13321

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III. Intelligence Information for CVE-2025-13321

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Same Patch Batch · Mattermost · 2025-12-17 · 7 CVEs total

CVE-2025-12689 6.5 MEDIUM DoS in Calls plugin via malformed UTF-8 in WebSocket request
CVE-2025-62190 4.3 MEDIUM CSRF Allows Call Initiation and Message Delivery
CVE-2025-13326 3.9 LOW Mattermost Desktop App fails to enable Hardened Runtime when packaged for Mac App Store
CVE-2025-13324 3.7 LOW Lack of Invalidation of Legacy Remote Cluster Invite Tokens After Confirmation
CVE-2025-62690 3.1 LOW Open redirect in error page when link opened in new tab
CVE-2025-13352 3.0 LOW Mattermost GitHub Plugin allows unauthorized GitHub reactions via reaction forwarding hija

IV. Related Vulnerabilities

Same product: Mattermost
Same vendor: Mattermost
Same weakness: CWE-532

V. Comments for CVE-2025-13321

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