How severe is CVE-2025-55074?

CVE-2025-55074 has a CVSS 3.x base score of 3.0, rated low severity. It is exploitable over network with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2025-55074 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-55074?

CVE-2025-55074 affects Mattermost Mattermost Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-55074?

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

Does CVE-2025-55074 have an EU (EUVD) identifier?

Yes. CVE-2025-55074 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-198045.

When was CVE-2025-55074 published?

CVE-2025-55074 was published on 2025-11-18 and last updated on 2026-06-17.

CVE-2025-55074

CVE-2025-55074 is a low-severity vulnerability in Mattermost Mattermost Server with a CVSS 3.x base score of 3.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Low (CVSS 3.x base score 3.0)
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-198045
Affected product: Mattermost Mattermost Server
Published: 2025-11-18
Last modified: 2026-06-17

Description

Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11 fail to enforce access permissions on the Agents plugin which allows other users to determine when users had read channels via channel member objects

Frequently asked questions

What is CVE-2025-55074?: Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11 fail to enforce access permissions on the Agents plugin which allows other users to determine when users had read channels via channel member objects
How severe is CVE-2025-55074?: CVE-2025-55074 has a CVSS 3.x base score of 3.0, rated low severity. It is exploitable over network with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2025-55074 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-55074?: CVE-2025-55074 affects Mattermost Mattermost Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-55074?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-55074 have an EU (EUVD) identifier?: Yes. CVE-2025-55074 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-198045.
When was CVE-2025-55074 published?: CVE-2025-55074 was published on 2025-11-18 and last updated on 2026-06-17.

References

https://mattermost.com/security-updates

Affected products (1)

cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*

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