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CVE-2024-39361— Creating posts with user-defined IDs permitted in CreatePost API

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，该漏洞源于系统未能阻止用户为其帖子指定RemoteId，攻击者能够创建具有用户定义ID的帖子。以下版本受到影响：9.8.0、9.7.x至9.7.4、9.6.x至9.6.2以及9.5.x至9.5.5。

CVSS 3.1 · Low EPSS 0.28% · P18

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2024-39361

Vulnerability Information
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Vulnerability Title
Creating posts with user-defined IDs permitted in CreatePost API
Source: CVE Program / CVE List V5
Vulnerability Description
Mattermost versions 9.8.0, 9.7.x <= 9.7.4, 9.6.x <= 9.6.2 and 9.5.x <= 9.5.5 fail to prevent users from specifying a RemoteId for their posts which allows an attacker to specify both a remoteId and the post ID, resulting in creating a post with a user-defined post ID. This can cause some broken functionality in the channel or thread with user-defined posts
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/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，该漏洞源于系统未能阻止用户为其帖子指定RemoteId，攻击者能够创建具有用户定义ID的帖子。以下版本受到影响：9.8.0、9.7.x至9.7.4、9.6.x至9.6.2以及9.5.x至9.5.5。
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 9.8.0 -

II. Public POCs for CVE-2024-39361

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III. Intelligence Information for CVE-2024-39361

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Same Patch Batch · Mattermost · 2024-07-03 · 6 CVEs total

CVE-2024-39830 8.1 HIGH Timing attack during remote cluster token comparison when shared channels are enabled
CVE-2024-6428 5.3 MEDIUM Limited DoS due to permitting creating users with user-defined IDs
CVE-2024-39807 3.1 LOW Channel IDs of archived/restored channels leaked via webhook events
CVE-2024-36257 2.7 LOW Lack of permission check when updating the profile picture of a remote user (shared channe
CVE-2024-39353 2.7 LOW RemoteClusterFrame payloads are audit logged in full

IV. Related Vulnerabilities

Same product: Mattermost
Same vendor: Mattermost
Same weakness: CWE-284

V. Comments for CVE-2024-39361

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