CVE-2024-28053Network attack vector

Server crash via unbounded email payload parsing

Published Mar 15, 2024 · Updated Aug 12, 2024

Resource exhaustion in Mattermost Server 8.1.0 through 8.1.9 allows remote authenticated users to crash the server via a large email payload. The email-payload ingestion path reads and parses attacker-controlled content without enforcing a payload-size limit. A valid low-privilege account and a sufficiently large payload are required, and the resulting resource exhaustion interrupts the server.

CVSS severity3.1
Low
EPSS probability0.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in Mattermost Server 8.1.0 through 8.1.9 allows remote authenticated users to crash the server via a large email payload. The email-payload ingestion path reads and parses attacker-controlled content without enforcing a payload-size limit. A valid low-privilege account and a sufficiently large payload are required, and the resulting resource exhaustion interrupts the server.

The record

CVE
CVE-2024-28053
Published
Mar 15, 2024
Updated
Aug 12, 2024
Vendor
Mattermost
Product
Mattermost
Classifications
CWE-400, CWE-770, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 15, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 12, 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=8.1.0 <=8.1.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Mattermost · Mattermostversion=8.1.0 <=8.1.9

Published CVSS scores

6.5NISTCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
3.1Mattermost, Inc.CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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
T1499Endpoint Denial of Service

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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