CVE-2023-2788— Deactivated user can retain access using oauth2 api
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I. Basic Information for CVE-2023-2788
Vulnerability Information
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Vulnerability Title
Deactivated user can retain access using oauth2 api
Source: NVD (National Vulnerability Database)
Vulnerability Description
Mattermost fails to check if an admin user account active after an oauth2 flow is started, allowing an attacker with admin privileges to retain persistent access to Mattermost by obtaining an oauth2 access token while the attacker's account is deactivated.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
授权机制缺失
Source: NVD (National Vulnerability Database)
Vulnerability Title
Mattermost 代码问题漏洞
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，该漏洞源于允许具有管理员权限的攻击者通过获取oauth2访问令牌来进行权限维持。
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 ~ 7.1.9 | - |
II. Public POCs for CVE-2023-2788
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Mattermost · 2023-06-16 · 11 CVEs total
| CVE-2023-2793 | 6.5 MEDIUM | Stack exhaustion in PreparePostForClientWithEmbedsAndImages |
| CVE-2023-2792 | 6.5 MEDIUM | Ephemeral messages return private channel contents in permalink previews |
| CVE-2023-2787 | 6.5 MEDIUM | Collapsed Reply Threads APIs leak message contents from private channels |
| CVE-2023-2785 | 4.3 MEDIUM | Specially crafted search query can cause large log entries in postgres |
| CVE-2023-2831 | 4.3 MEDIUM | Denial of Service while unescaping a Markdown string |
| CVE-2023-2791 | 4.3 MEDIUM | Playbooks lets you edit arbitrary posts |
| CVE-2023-2786 | 4.3 MEDIUM | Channel commands execution doesn't properly verify permissions |
| CVE-2023-2783 | 4.3 MEDIUM | App Framework does not checks for the secret provided in the incoming webhook request |
| CVE-2023-2784 | 4.2 MEDIUM | Apps Framework allows install requests from regular members via an internal path |
| CVE-2023-2797 | 3.1 LOW | Path traversal in GitHub plugin's code preview feature |
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- 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
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Same weakness: CWE-862
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