CVE-2024-4183Network attack vector

Authenticated server crash via unbounded active sessions

Published Apr 26, 2024 · Updated Aug 1, 2024

Uncontrolled resource consumption in affected Mattermost Server releases allows remote authenticated users to crash the server through its REST API. Session creation does not cap active sessions, allowing the sessions table to grow without bound; getSessions then loads the accumulated records. A valid account is required to create sessions and repeatedly request the session list, exhausting server resources and interrupting service.

CVSS severity4.3
Medium
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in affected Mattermost Server releases allows remote authenticated users to crash the server through its REST API. Session creation does not cap active sessions, allowing the sessions table to grow without bound; getSessions then loads the accumulated records. A valid account is required to create sessions and repeatedly request the session list, exhausting server resources and interrupting service.

The record

CVE
CVE-2024-4183
Published
Apr 26, 2024
Updated
Aug 1, 2024
Vendor
Mattermost
Product
Mattermost
Classifications
CWE-400, CWE-770, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 26, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 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=-
  2. Affected versionversion=8.1.0
  3. Affected versionversion=8.1.0 <=8.1.11
  4. Affected versionversion=9.4.0
  5. Affected versionversion=9.4.0 <=9.4.4
  6. Affected versionversion=9.5.0 <=9.5.2
  7. Affected versionversion=9.6.0
  8. Affected versionversion=9.6.0 <=8.1.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Mattermost · Mattermostversion=-; version=8.1.0; version=8.1.0 <=8.1.11; version=9.4.0; version=9.4.0 <=9.4.4; version=9.5.0 <=9.5.2; version=9.6.0; version=9.6.0 <=8.1.10

Published CVSS scores

4.3Mattermost, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
6.5NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
CWE-770Allocation of Resources Without Limits or Throttling
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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