CVE-2025-44004Network attack vector

Unauthenticated subscription creation via missing administrator check

Published Aug 11, 2025 · Updated Aug 11, 2025

Missing authentication in Mattermost Confluence Plugin before 1.5.0 allows remote attackers to create channel subscriptions through its API. The handleSaveSubscription handler checks channel access but does not require system-administrator authorization before saving the supplied subscription. No credentials or user interaction are required, and exploitation alters notification routing and can expose Confluence update data to an unauthorized channel.

CVSS severity7.2
High
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in Mattermost Confluence Plugin before 1.5.0 allows remote attackers to create channel subscriptions through its API. The handleSaveSubscription handler checks channel access but does not require system-administrator authorization before saving the supplied subscription. No credentials or user interaction are required, and exploitation alters notification routing and can expose Confluence update data to an unauthorized channel.

The record

CVE
CVE-2025-44004
Published
Aug 11, 2025
Updated
Aug 11, 2025
Vendor
Mattermost
Product
Mattermost Confluence Plugin
Classifications
CWE-306
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

7.2GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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.

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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-306Missing Authentication for Critical Function

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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