CVE-2023-49607Network attack vector

Authenticated plugin crash via unchecked type assertion

Published Dec 12, 2023 · Updated Aug 2, 2024

Improper input validation in affected Mattermost Server releases allows remote authenticated users to crash the Playbooks plugin via a request. The updateStatusDialog handler treated the untrusted reminder submission as a string without checking its Go interface type, so a non-string value triggered a panic. An account permitted to manage an active playbook run can reach the endpoint; the reported consequence is interruption of the Playbooks plugin, not the Mattermost server.

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

Improper input validation in affected Mattermost Server releases allows remote authenticated users to crash the Playbooks plugin via a request. The updateStatusDialog handler treated the untrusted reminder submission as a string without checking its Go interface type, so a non-string value triggered a panic. An account permitted to manage an active playbook run can reach the endpoint; the reported consequence is interruption of the Playbooks plugin, not the Mattermost server.

The record

CVE
CVE-2023-49607
Published
Dec 12, 2023
Updated
Aug 2, 2024
Vendor
Mattermost
Product
Mattermost
Classifications
CWE-754, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 12, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 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

4.3Mattermost, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/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 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-754Improper Check for Unusual or Exceptional Conditions
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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