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Vulnerabilities

Vulnerability · CVE-2025-54458

Mattermost Confluence Plugin version <1.5.0 fails to check the access of the user to the Confluence space which allows attackers to create a subscription for a Confluence space the

Published Aug 11, 2025 · catalog updated Aug 11, 2025 · Mattermost Mattermost Confluence Plugin

Last checked Oct 23, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-54458. EPSS is 0.21%. Act only if a listed version of Mattermost Mattermost Confluence Plugin is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Medium5.0
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.21%
Remediation
Version ranges on file
Affected products
stated Mattermost Confluence Plugin · vendor Mattermost Mattermost Confluence Plugin

Mattermost Confluence Plugin version <1.5.0 fails to check the access of the user to the Confluence space which allows attackers to create a subscription for a Confluence space the user does not have access to via the create subscription endpoint.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • stated Mattermost Confluence Plugin< 1.5.0
  • vendor Mattermost Mattermost Confluence Pluginversion unspecified

How to fix CVE-2025-54458

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-54458. EPSS is 0.21%. Act only if a listed version of Mattermost Mattermost Confluence Plugin is installed.

Which versions are affected?

Compare what you have installed with Mattermost Confluence Plugin < 1.5.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.21%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 11, 2025 · EUVD

    Detected

    Mattermost Confluence Plugin version <1.5.0 fails to check the access of the user to the Confluence space which allows attackers to create a subscription for a Confluence space the user does not have access to via the create subscription endpoint.

  2. Aug 11, 2025 · EUVD

    Updated

    Mattermost Confluence Plugin version <1.5.0 fails to check the access of the user to the Confluence space which allows attackers to create a subscription for a Confluence space the user does not have access to via the create subscription endpoint.

Sources

  • CVE.orgVulnerability recordCVE-2025-54458

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-54458

    30-day exploitation probability 0.21%

    first.org
  • EUVDVulnerability recordEUVD-2025-24173

    Mattermost Confluence Plugin version <1.5.0 fails to check the access of the user to the Confluence space which allows attackers to create a subscription for a Confluence space the user does not have access to via the create subscription endpoint.

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 23, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSOct 23, 2026
  • CVE.orgOct 21, 2026
  • EUVDOct 20, 2026