CVE-2026-75025— Mattermost Desktop local network access from server-rendered content
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 桌面应用版本 ≤6.2（具体修复版本为 6.2.2.0）修复了一个安全漏洞：此前，Mattermost 桌面版对服务器渲染内容的隔离不够充分，导致其可能访问本地或私有网络资源。感谢 game0v3r 在 Mattermost 负责任披露政策下贡献了此改进。Mattermost 安全公告 ID：MMSA-2026-00698
Possible ATT&CK Techniques 2 AI
T1203 · Exploitation for Client Execution T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 3
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Mattermost | Mattermost | ≤ 6.2.2 |
affected |
6.3.0 |
unaffected | ||
6.2.3.0 |
unaffected |
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I. Basic Information for CVE-2026-75025
Vulnerability Information
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Vulnerability Title
Mattermost Desktop local network access from server-rendered content
Source: CVE Program / CVE List V5
Vulnerability Description
Mattermost Desktop App versions <=6.2 6.2.2.0 Fixed an issue where Mattermost Desktop did not sufficiently restrict server-rendered content from accessing local or private network resources. Thanks to game0v3r for contributing to this improvement under the Mattermost responsible disclosure policy. Mattermost Advisory ID: MMSA-2026-00698
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
源验证错误
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Mattermost | Mattermost | 0 ~ 6.2.2 | - |
|
II. Public POCs for CVE-2026-75025
| # | POC Description | Source Link | Shenlong Link |
|---|
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V. Comments for CVE-2026-75025
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