How severe is CVE-2024-4198?

CVE-2024-4198 has a CVSS 3.x base score of 2.7, rated low severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2024-4198 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-4198?

CVE-2024-4198 primarily affects Mattermost Mattermost Server. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2024-4198?

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

Does CVE-2024-4198 have an EU (EUVD) identifier?

Yes. CVE-2024-4198 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-1107.

When was CVE-2024-4198 published?

CVE-2024-4198 was published on 2024-04-26 and last updated on 2026-06-17.

CVE-2024-4198

CVE-2024-4198 is a low-severity vulnerability in Mattermost Mattermost Server with a CVSS 3.x base score of 2.7. 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-284.

Key facts

Severity: Low (CVSS 3.x base score 2.7)
EPSS exploit prediction: 1% (39th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-1107
Weakness: CWE-284
Affected product: Mattermost Mattermost Server
Published: 2024-04-26
Last modified: 2026-06-17

Description

Mattermost versions 9.6.0, 9.5.x before 9.5.3, and 8.1.x before 8.1.12 fail to fully validate role changes which allows an attacker authenticated as team admin to demote users to guest via crafted HTTP requests.

Frequently asked questions

What is CVE-2024-4198?: Mattermost versions 9.6.0, 9.5.x before 9.5.3, and 8.1.x before 8.1.12 fail to fully validate role changes which allows an attacker authenticated as team admin to demote users to guest via crafted HTTP requests.
How severe is CVE-2024-4198?: CVE-2024-4198 has a CVSS 3.x base score of 2.7, rated low severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2024-4198 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-4198?: CVE-2024-4198 primarily affects Mattermost Mattermost Server. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-4198?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-4198 have an EU (EUVD) identifier?: Yes. CVE-2024-4198 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-1107.
When was CVE-2024-4198 published?: CVE-2024-4198 was published on 2024-04-26 and last updated on 2026-06-17.

References

https://mattermost.com/security-updates

Affected products (5)

cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
cpe:2.3:a:mattermost:mattermost_server:9.6.0:-:*:*:*:*:*:*
cpe:2.3:a:mattermost:mattermost_server:9.6.0:rc1:*:*:*:*:*:*
cpe:2.3:a:mattermost:mattermost_server:9.6.0:rc2:*:*:*:*:*:*
cpe:2.3:a:mattermost:mattermost_server:9.6.0:rc3:*:*:*:*:*:*

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