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Fencer Vulns
low 2.7

CVE-2024-4195 json

Mattermost allows team admins to promote guests to team admins

published 2024-04-26 2 y ago modified 2026-06-17 4 mo ago also GHSA-5fh7-7mw7-mmx5 , GO-2024-2793 , EUVD-2024-1100

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 a team admin to promote guests to team admins 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
  • Mattermost Mattermost 8.1.12, 9.5.3, 9.6.1, 9.7.0
  • jenkins 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-2024-4195 updated cvss 2.7

mattermost: fail to fully validate role changes leading to promote guests to team admins

  • 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
>=9.5.0, <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
9.5.3
8.1.12
8.1.12+incompatible
9.5.3+incompatible

Affected products

  • Mattermost Mattermost
  • jenkins 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.