CVE-2023-50333— Lack of restriction to manage group names for freshly demoted guests
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，该漏洞源于无法为刚刚降级为访客的用户更新当前会话的权限，从而允许新降级的访客更改群组名称。
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I. Basic Information for CVE-2023-50333
Vulnerability Information
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Vulnerability Title
Lack of restriction to manage group names for freshly demoted guests
Source: CVE Program / CVE List V5
Vulnerability Description
Mattermost fails to update the permissions of the current session for a user who was just demoted to guest, allowing freshly demoted guests to change group names.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
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，该漏洞源于无法为刚刚降级为访客的用户更新当前会话的权限，从而允许新降级的访客更改群组名称。
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 ~ 9.2.2 | - |
|
II. Public POCs for CVE-2023-50333
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Same Patch Batch · Mattermost · 2024-01-02 · 3 CVEs total
| CVE-2023-47858 | 4.3 MEDIUM | Details of archived public channels are leaked to members of another team |
| CVE-2023-48732 | 4.3 MEDIUM | Keywords that trigger mentions are leaked to other users |
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CVE-2026-96260
Mattermost server missing request body size limit on plugin -
CVE-2026-96259
Mattermost server-side request forgery via OAuth endpoints c -
CVE-2026-95666
Unbounded post ID array in the bulk reactions endpoint allow -
CVE-2026-12284
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Same weakness: CWE-284
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V. Comments for CVE-2023-50333
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