CVE-2023-5159Network attack vector

Unauthorized bot account changes via insufficient permission checks

Published Sep 29, 2023 · Updated Sep 20, 2024

Incorrect authorization in Mattermost Server allows remote authenticated users with a User Manager role to manage or update bot accounts. The bot-management path accepts generic user-edit permission without enforcing the authorization required specifically for bot management. Exploitation requires the User Manager role with user-edit permission and permits unauthorized changes to bot accounts.

CVSS severity3.8
Low
EPSS probability0.37%
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 Server allows remote authenticated users with a User Manager role to manage or update bot accounts. The bot-management path accepts generic user-edit permission without enforcing the authorization required specifically for bot management. Exploitation requires the User Manager role with user-edit permission and permits unauthorized changes to bot accounts.

The record

CVE
CVE-2023-5159
Published
Sep 29, 2023
Updated
Sep 20, 2024
Vendor
Mattermost
Product
Mattermost
Classifications
CWE-863, T1098
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 29, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 20, 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 <=8.1.0
  2. Affected versionversion=0 <=8.7.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Mattermost · Mattermostversion=0 <=8.1.0; version=0 <=8.7.9

Published CVSS scores

2.7NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
3.8Mattermost, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/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
T1098Account Manipulation

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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