CVE-2025-46702Network attack vector

Private-channel access via unsynchronized playbook permissions

Published Jun 30, 2025 · Updated Jun 30, 2025

Incorrect authorization in affected Mattermost Server releases allows remote authenticated users to access and manage private channels. The permission-scheme UI aggregated team and channel grants for All Members but omitted playbook-member and run-member roles, so saving the scheme left participant-management permissions in those roles. Member-level access is sufficient to add or remove private-channel users through playbook runs even after Manage Members is explicitly removed, exposing channel content and granting guests channel-management access.

CVSS severity5.4
Medium
EPSS probability0.18%
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 affected Mattermost Server releases allows remote authenticated users to access and manage private channels. The permission-scheme UI aggregated team and channel grants for All Members but omitted playbook-member and run-member roles, so saving the scheme left participant-management permissions in those roles. Member-level access is sufficient to add or remove private-channel users through playbook runs even after Manage Members is explicitly removed, exposing channel content and granting guests channel-management access.

The record

CVE
CVE-2025-46702
Published
Jun 30, 2025
Updated
Jun 30, 2025
Vendor
Mattermost
Product
Mattermost
Classifications
CWE-863, T1098
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 30, 2025Record 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=10.5.0 <=10.5.5
  2. Affected versionversion=10.6.0 <=10.6.5
  3. Affected versionversion=10.7.0 <=10.7.2
  4. Affected versionversion=10.8.0
  5. Affected versionversion=9.11.0 <=9.11.15

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Mattermost · Mattermostversion=10.5.0 <=10.5.5; version=10.6.0 <=10.6.5; version=10.7.0 <=10.7.2; version=10.8.0; version=9.11.0 <=9.11.15

Published CVSS scores

5.4Mattermost, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

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.

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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