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CVE-2023-1775— Unsanitized events sent over Websocket to regular users in a High Availability environment

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 存在信息泄露漏洞，该漏洞源于在高可用性配置中运行时，Mattermost 无法清理广播给所有用户的一些 user_updated 和 post_deleted 事件，导致敏感信息泄露。

CVSS 4.3 · Medium EPSS 0.55% · P43

Possible ATT&CK Techniques 1 AI

T1005 · Data from Local System
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I. Basic Information for CVE-2023-1775

Vulnerability Information
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Vulnerability Title
Unsanitized events sent over Websocket to regular users in a High Availability environment
Source: CVE Program / CVE List V5
Vulnerability Description
When running in a High Availability configuration, Mattermost fails to sanitize some of the user_updated and post_deleted events broadcast to all users, leading to disclosure of sensitive information to some of the users with currently connected Websocket clients.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Mattermost 信息泄露漏洞
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 存在信息泄露漏洞，该漏洞源于在高可用性配置中运行时，Mattermost 无法清理广播给所有用户的一些 user_updated 和 post_deleted 事件，导致敏感信息泄露。
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 3.3.0 ~ 7.7.1 -

II. Public POCs for CVE-2023-1775

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III. Intelligence Information for CVE-2023-1775

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Other References for CVE-2023-1775 (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-2023-1774 4.2 MEDIUM Unauthorized email invite to a private channel

IV. Related Vulnerabilities

Same product: Mattermost
Same vendor: Mattermost
Same weakness: CWE-200

V. Comments for CVE-2023-1775

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