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Fencer Vulns
low 2.7

CVE-2024-4198 json

Mattermost fails to fully validate role changes

published 2024-04-26 2 y ago modified 2026-06-17 4 mo ago also GHSA-5qx9-9ffj-5r8f , GO-2024-2794 , EUVD-2024-1107

cvss
2.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 43%
public exploits
0
none known

Summary

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.

Patch / fix

  • go github.com/mattermost/mattermost-server 8.1.12, 8.1.12+incompatible, 9.5.3, 9.5.3+incompatible, 9.6.1, 9.6.1+incompatible
  • Mattermost Mattermost 8.1.12, 9.5.3, 9.6.1, 9.7.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-4198 updated cvss 2.7

mattermost: fail to fully validate role changes which allows an attacker authenticated as team admin to demote users to guest

  • Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/acm-grafana-rhel8 Red Hat Advanced Cluster Security 3 advanced-cluster-security/rhacs-docs-rhel8, advanced-cluster-security/rhacs-main-rhel8, advanced-cluster-security/rhacs-roxctl-rhel8, advanced-cluster-security/rhacs-scanner-rhel8, advanced-cluster-security/rhacs-rhel8-operator, advanced-cluster-security/rhacs-scanner-db-rhel8
    affected: no fix available “Fix deferred”
  • Red Hat OpenShift Container Platform 4 openshift4/ose-grafana
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.50% chance of exploitation in the next 30 days, higher than 43% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 2.7 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
NVD 3.1 2.7 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
GitHub 3.1 2.7 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N

Affected packages

ecosystem package affected fixed in
go github.com/mattermost/mattermost-server
>=9.6.0-rc1, <9.6.1
>=9.5.0, <9.5.3
>=8.1.0, <8.1.12
>=8.1.0+incompatible, <8.1.12+incompatible
>=9.5.0+incompatible, <9.5.3+incompatible
>=9.6.0-rc1+incompatible, <9.6.1+incompatible
9.6.1
9.5.3
8.1.12
8.1.12+incompatible
9.5.3+incompatible
9.6.1+incompatible

Affected products

  • Mattermost Mattermost

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.