CVE-2025-48731Network attack vector

Unauthorized subscription edits via missing space access check

Published Aug 11, 2025 · Updated Aug 11, 2025

Missing authorization in Mattermost Confluence Plugin before 1.5.0 allows remote authenticated users to edit inaccessible space subscriptions. The edit-channel-subscription PUT handler passed caller-supplied subscription data to EditSubscription without verifying the caller's Confluence-space access. A valid Mattermost session and an existing subscription are required; successful abuse changes notification settings for a space the account cannot access.

CVSS severity6.4
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

Missing authorization in Mattermost Confluence Plugin before 1.5.0 allows remote authenticated users to edit inaccessible space subscriptions. The edit-channel-subscription PUT handler passed caller-supplied subscription data to EditSubscription without verifying the caller's Confluence-space access. A valid Mattermost session and an existing subscription are required; successful abuse changes notification settings for a space the account cannot access.

The record

CVE
CVE-2025-48731
Published
Aug 11, 2025
Updated
Aug 11, 2025
Vendor
Mattermost
Product
Mattermost Confluence Plugin
Classifications
CWE-862, T1565.001
Attack vector
network
Privileges
authenticated

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 privilegesauthenticated

What is affected?

Mattermost · Mattermost Confluence Pluginversion=0 <1.5.0

Published CVSS scores

6.4MattermostCVSS:3.1/AV:N/AC:L/PR:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1565.001Stored Data 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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