CVE-2025-55073— MS Teams plugin OAuth allows editing arbitrary posts
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I. Basic Information for CVE-2025-55073
Vulnerability Information
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Vulnerability Title
MS Teams plugin OAuth allows editing arbitrary posts
Source: NVD (National Vulnerability Database)
Vulnerability Description
Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11, 10.12.x <= 10.12.0 fail to validate the relationship between the post being updated and the MSTeams plugin OAuth flow which allows an attacker to edit arbitrary posts via a crafted MSTeams plugin OAuth redirect URL.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
关键功能的认证机制缺失
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 10.11.3及之前的10.11.x版本、10.5.11及之前的10.5.x版本和10.12.0及之前的10.12.x版本存在安全漏洞，该漏洞源于未验证帖子更新与MSTeams插件OAuth流程的关系，可能导致攻击者通过特制URL编辑任意帖子。
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 | 10.11.0 ~ 10.11.3 | - |
II. Public POCs for CVE-2025-55073
| # | POC Description | Source Link | Shenlong Link |
|---|
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No public POC found.
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Same Patch Batch · Mattermost · 2025-11-14 · 5 CVEs total
| CVE-2025-55070 | 6.5 MEDIUM | Lack of MFA enforcement in WebSocket connections |
| CVE-2025-11794 | 4.9 MEDIUM | Password hash and MFA secret returned in user email verification endpoint |
| CVE-2025-11776 | 4.3 MEDIUM | Guest user can discover archived public channels |
| CVE-2025-41436 | 3.1 LOW | Unauthorized access to archived channel content via threads interface |
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Unbounded Request Body Read in MS Teams Plugin {{/changes}} - CVE-2026-21388
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Same vendor: Mattermost
- CVE-2026-3590
Race Condition in Guest Magic Link Authentication Allows Tok - CVE-2026-28741
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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-306
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V. Comments for CVE-2025-55073
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