CVE-2023-1774— Unauthorized email invite to a private channel
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Mattermost在处理团队私人频道的电子邮件邀请时，无法验证邀请者对该频道的许可，攻击者利用该漏洞可以邀请自己加入私人频道。
Possible ATT&CK Techniques 1 AI
T1133 · External Remote Services
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I. Basic Information for CVE-2023-1774
Vulnerability Information
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Vulnerability Title
Unauthorized email invite to a private channel
Source: CVE Program / CVE List V5
Vulnerability Description
When processing an email invite to a private channel on a team, Mattermost fails to validate the inviter's permission to that channel, allowing an attacker to invite themselves to a private channel.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
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Mattermost在处理团队私人频道的电子邮件邀请时，无法验证邀请者对该频道的许可，攻击者利用该漏洞可以邀请自己加入私人频道。
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 ~ 7.7.1 | - |
|
II. Public POCs for CVE-2023-1774
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Other References for CVE-2023-1774 (1)
Same Patch Batch · Mattermost · 2023-03-31 · 4 CVEs total
| CVE-2023-1776 | 7.3 HIGH | Stored XSS via SVG attachment on Boards |
| CVE-2023-1777 | 6.5 MEDIUM | Information disclosure in linked message previews |
| CVE-2023-1775 | 4.3 MEDIUM | Unsanitized events sent over Websocket to regular users in a High Availability environment |
IV. Related Vulnerabilities
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Same vendor: Mattermost
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CVE-2026-18799
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Private team metadata disclosure via the team search API -
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Mattermost fails to reject OAuth application sessions in acc
Same weakness: CWE-862
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V. Comments for CVE-2023-1774
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