CVE-2024-42411Network attack vector

Account age falsification via unrestricted creation timestamp

Published Aug 22, 2024 · Updated Aug 22, 2024

Improper input validation in affected Mattermost server releases allows remote attackers to falsify account creation dates through the user API. POST /api/v4/users accepts a caller-supplied creation timestamp without restricting it to a server-generated value, so the stored account record can claim an earlier creation time. No authentication or user interaction is required, and the resulting integrity impact is limited to misleading administrators about account age.

CVSS severity5.3
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in affected Mattermost server releases allows remote attackers to falsify account creation dates through the user API. POST /api/v4/users accepts a caller-supplied creation timestamp without restricting it to a server-generated value, so the stored account record can claim an earlier creation time. No authentication or user interaction is required, and the resulting integrity impact is limited to misleading administrators about account age.

The record

CVE
CVE-2024-42411
Published
Aug 22, 2024
Updated
Aug 22, 2024
Vendor
Mattermost
Product
Mattermost
Classifications
CWE-754, T1565.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 22, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 22, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=9.10.0
  2. Affected versionversion=9.5.0 <=9.5.7
  3. Affected versionversion=9.8.0 <=9.8.2
  4. Affected versionversion=9.9.0 <=9.9.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mattermost · Mattermostversion=9.10.0; version=9.5.0 <=9.5.7; version=9.8.0 <=9.8.2; version=9.9.0 <=9.9.1

Published CVSS scores

5.3Mattermost, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-754Improper Check for Unusual or Exceptional Conditions
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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