How severe is CVE-2025-54458?

CVE-2025-54458 has a CVSS 3.x base score of 5.0, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2025-54458 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-54458?

CVE-2025-54458 affects Mattermost Confluence. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-54458?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-54458 have an EU (EUVD) identifier?

Yes. CVE-2025-54458 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-24173.

When was CVE-2025-54458 published?

CVE-2025-54458 was published on 2025-08-11 and last updated on 2026-06-17.

CVE-2025-54458

CVE-2025-54458 is a medium-severity vulnerability in Mattermost Confluence with a CVSS 3.x base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-862.

Key facts

Severity: Medium (CVSS 3.x base score 5.0)
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-24173
Weakness: CWE-862
Affected product: Mattermost Confluence
Published: 2025-08-11
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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 user does not have access to via the create subscription endpoint.
How severe is CVE-2025-54458?: CVE-2025-54458 has a CVSS 3.x base score of 5.0, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2025-54458 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-54458?: CVE-2025-54458 affects Mattermost Confluence. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-54458?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-54458 have an EU (EUVD) identifier?: Yes. CVE-2025-54458 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-24173.
When was CVE-2025-54458 published?: CVE-2025-54458 was published on 2025-08-11 and last updated on 2026-06-17.

References

https://mattermost.com/security-updates

Affected products (1)

cpe:2.3:a:mattermost:confluence:*:*:*:*:*:mattermost:*:*

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