CVE-2023-45847Network attack vector

Plugin crash via unchecked checklist title length

Published Dec 12, 2023 · Updated Dec 2, 2024

Uncontrolled resource consumption in Mattermost Playbooks allows remote authenticated users to crash the plugin via a crafted request. The run-checklist title update path accepts an attacker-supplied title without checking its length, causing resource exhaustion during request processing. A low-privileged account that can update a playbook run checklist can interrupt Playbooks availability, while confidentiality and integrity remain unaffected.

CVSS severity4.3
Medium
EPSS probability0.65%
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 Mattermost Playbooks allows remote authenticated users to crash the plugin via a crafted request. The run-checklist title update path accepts an attacker-supplied title without checking its length, causing resource exhaustion during request processing. A low-privileged account that can update a playbook run checklist can interrupt Playbooks availability, while confidentiality and integrity remain unaffected.

The record

CVE
CVE-2023-45847
Published
Dec 12, 2023
Updated
Dec 2, 2024
Vendor
Mattermost
Product
Mattermost
Classifications
CWE-400, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 12, 2023CVE publishedPublication date reported by the CVE source.
  2. Dec 2, 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=0 <=8.1.5
  2. Affected versionversion=0 <=9.0.3
  3. Affected versionversion=0 <=9.1.2
  4. Affected versionversion=0 <=9.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Mattermost · Mattermostversion=0 <=8.1.5; version=0 <=9.0.3; version=0 <=9.1.2; version=0 <=9.2.1

Published CVSS scores

4.3MattermostCVSS:3.1/AV:N/AC:L/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
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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