CVE-2023-5194Network attack vector

Manager demotion or deactivation via missing target checks

Published Sep 29, 2023 · Updated Sep 5, 2024

Incorrect authorization in Mattermost 7.8.9 and earlier and 8.1.0 and earlier allows remote authenticated users to demote or deactivate managers. The user-demotion and deactivation paths validate the acting account's manager role but fail to reject a peer manager as the target. A system/user manager session is required; exploitation removes a peer manager's role or interrupts that account's access without exposing data.

CVSS severity2.7
Low
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in Mattermost 7.8.9 and earlier and 8.1.0 and earlier allows remote authenticated users to demote or deactivate managers. The user-demotion and deactivation paths validate the acting account's manager role but fail to reject a peer manager as the target. A system/user manager session is required; exploitation removes a peer manager's role or interrupts that account's access without exposing data.

The record

CVE
CVE-2023-5194
Published
Sep 29, 2023
Updated
Sep 5, 2024
Vendor
Mattermost
Product
Mattermost
Classifications
CWE-863, T1531
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 29, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 5, 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 <=7.8.9
  2. Affected versionversion=0 <=8.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Mattermost · Mattermostversion=0 <=7.8.9; version=0 <=8.1.0

Published CVSS scores

4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
2.7Mattermost, Inc.CVSS:3.1/AV:N/AC:L/PR:H/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 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-863Incorrect Authorization
T1531Account Access Removal

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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