CVE-2025-44001Network attack vector

Unauthenticated subscription disclosure via missing channel access check

Published Aug 11, 2025 · Updated Aug 11, 2025

Missing authorization in Mattermost Confluence Plugin before 1.5.0 allows remote attackers to read channel subscription details via its API. The Get Channel Subscriptions details endpoint returns subscription data for a supplied channel without verifying that the requester can access that channel. No authentication is required by the published vector, but high attack complexity limits the consequence to disclosure of subscription details.

CVSS severity4.0
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Mattermost Confluence Plugin before 1.5.0 allows remote attackers to read channel subscription details via its API. The Get Channel Subscriptions details endpoint returns subscription data for a supplied channel without verifying that the requester can access that channel. No authentication is required by the published vector, but high attack complexity limits the consequence to disclosure of subscription details.

The record

CVE
CVE-2025-44001
Published
Aug 11, 2025
Updated
Aug 11, 2025
Vendor
Mattermost
Product
Mattermost Confluence Plugin
Classifications
CWE-862, T1213.005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 11, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 11, 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=0 <1.5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mattermost · Mattermost Confluence Pluginversion=0 <1.5.0

Published CVSS scores

4.0Mattermost, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1213.005Data from Information Repositories: Messaging Applications

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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