CVE-2025-9078— Weak cache keys lead to post IDOR and link preview poisoning
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I. Basic Information for CVE-2025-9078
Vulnerability Information
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Vulnerability Title
Weak cache keys lead to post IDOR and link preview poisoning
Source: NVD (National Vulnerability Database)
Vulnerability Description
Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.10.x <= 10.10.1, 10.9.x <= 10.9.3 fail to properly validate cache keys for link metadata which allows authenticated users to access unauthorized posts and poison link previews via hash collision attacks on FNV-1 hashing
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
可逆的单向哈希
Source: NVD (National Vulnerability Database)
Vulnerability Title
Mattermost 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mattermost是美国Mattermost公司的一个开源协作平台。 Mattermost存在安全漏洞，该漏洞源于未正确验证链接元数据的缓存键，可能导致经过身份验证的用户通过FNV-1哈希冲突攻击访问未经授权的帖子和毒化链接预览。以下版本受到影响：10.8.3及之前的10.8.x版本、10.5.8及之前的10.5.x版本、9.11.17及之前的9.11.x版本、10.10.1及之前的10.10.x版本和10.9.3及之前的10.9.x版本。
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 | 10.8.0 ~ 10.8.3 | - |
II. Public POCs for CVE-2025-9078
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Mattermost · 2025-09-15 · 4 CVEs total
| CVE-2025-9072 | 7.6 HIGH | One-Click Mattermost Account Takeover via Poisoned RelayState SAML Parameter |
| CVE-2025-9076 | 6.5 MEDIUM | Mattermost Server exposes sensitive user credentials during shared channel membership sync |
| CVE-2025-9084 | 3.1 LOW | Open redirect in OAuth login |
IV. Related Vulnerabilities
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Same vendor: Mattermost
- CVE-2026-3590
Race Condition in Guest Magic Link Authentication Allows Tok - CVE-2026-28741
CSRF Protection Bypass Allows Updating a User's Authenticati - CVE-2026-27769
Connected Workspaces: Malicious remote server can manipulate - CVE-2026-24661
Unbounded Request Body Read in MS Teams Plugin {{/changes}} - CVE-2026-21388
Unbounded Request Body Read in MS Teams Plugin {{/lifecycle}
Same weakness: CWE-328
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V. Comments for CVE-2025-9078
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