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Fencer Vulns
medium 4.3

CVE-2024-43780 json

Unauthorized channel file upload

published 2024-08-22 2 y ago modified 2026-06-17 4 mo ago also BIT-mattermost-2024-43780 , EUVD-2024-2464 , GHSA-2jhx-w3vc-w59g , GO-2024-3089

cvss
4.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 20%
public exploits
0
none known

Summary

Mattermost versions 9.9.x <= 9.9.1, 9.5.x <= 9.5.7, 9.10.0, 9.8.x <= 9.8.2 fail to enforce permissions which allows a guest user with read access to upload files to a channel.

Patch / fix

  • go github.com/mattermost/mattermost/server/v8 9.5.8, 9.8.3, 9.9.2, 9.10.1
  • bitnami mattermost 9.5.8, 9.8.3, 9.9.2
  • go github.com/mattermost/mattermost-server 9.5.8+incompatible, 9.8.3+incompatible, 9.9.2+incompatible, 9.10.1+incompatible
  • Mattermost Mattermost 9.5.8, 9.8.3, 9.9.2, 9.10.1, 9.11.0

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-2024-43780 updated cvss 5.4

mattermost: permission enforcing failure allows a guest user with read access to upload files to a channel

  • Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/acm-grafana-rhel8
    affected: no fix available
  • Red Hat Advanced Cluster Security 4 advanced-cluster-security/rhacs-main-rhel8, advanced-cluster-security/rhacs-roxctl-rhel8, advanced-cluster-security/rhacs-rhel8-operator, advanced-cluster-security/rhacs-central-db-rhel8, advanced-cluster-security/rhacs-scanner-v4-rhel8, advanced-cluster-security/rhacs-scanner-v4-db-rhel8 Red Hat Ceph Storage 5 rhceph/rhceph-5-dashboard-rhel8 Red Hat Ceph Storage 6 rhceph/rhceph-6-dashboard-rhel9 Red Hat Ceph Storage 7 rhceph/grafana-rhel9 Red Hat OpenShift GitOps openshift-gitops-1/dex-rhel8
    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

0.28% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
GitHub 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
NVD 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
OSV 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Affected packages

ecosystem package affected fixed in
go github.com/mattermost/mattermost/server/v8
>=9.5.0, <9.5.8
>=9.10.0, <9.10.1
>=9.9.0, <9.9.2
>=9.8.0, <9.8.3
all versions
9.5.8
9.10.1
9.9.2
9.8.3
bitnami mattermost
>=9.5.0, <9.5.8
>=9.8.0, <9.8.3
>=9.9.0, <9.9.2
>=9.10.0, <=9.10.0
9.5.8
9.8.3
9.9.2
go github.com/mattermost/mattermost-server
>=9.5.0+incompatible, <9.5.8+incompatible
>=9.8.0+incompatible, <9.8.3+incompatible
>=9.9.0+incompatible, <9.9.2+incompatible
>=9.10.0+incompatible, <9.10.1+incompatible
9.5.8+incompatible
9.8.3+incompatible
9.9.2+incompatible
9.10.1+incompatible
go github.com/mattermost/mattermost-server/v5
all versions
 no fix listed
go github.com/mattermost/mattermost-server/v6
all versions
 no fix listed

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.