vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2024-39361

Creating posts with user-defined IDs permitted in CreatePost API

MEDIUM
5.4
CVSS Score
Published: July 3, 2024 at 08:35 AM UTC
Updated: June 17, 2026 at 07:41 AM UTC
1 product affected across 1 vendorMattermost

Using Mattermost by Mattermost?

Get instant alerts when new vulnerabilities affect Mattermost - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
MEDIUM5.4
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

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

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Mattermost· Mattermost
95%
9.5.0 ≤ v ≤ 9.5.59.5.0 ≤ v < 9.5.69.6.0 ≤ v ≤ 9.6.29.6.0 ≤ v < 9.6.39.7.0 ≤ v ≤ 9.7.49.7.0 ≤ v < 9.7.49.8.0 ≤ v < 9.8.19.5.09.6.09.7.09.8.0
Vendor states this is fixed in 9.5.6 (unaffected)
Vendor states this is fixed in 9.6.3 (unaffected)
Affected range stops below 9.7.4, so it looks safe — our inference, not a vendor statement
Vendor states this is fixed in 9.7.5 (unaffected)
Vendor states this is fixed in 9.8.1 (unaffected)
Vendor states this is fixed in 9.9.0 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: [email protected]
https://mattermost.com/security-updates

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.4MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
LOW
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-284NVD-CWE-Other

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card