Insufficient Authorization On Unlinked Channel Files
Published Sep 26, 2024
4.3
MEDIUMCVSS 3.1
EPSS 0.26%
Description
Mattermost versions 9.10.x <= 9.10.1, 9.9.x <= 9.9.2, 9.5.x <= 9.5.8 fail to limit access to channels files that have not been linked to a post which allows an attacker to view them in channels that they are a member of.
Affected products
-
- Version 9.10.0StatusaffectedConstraints<=9.10.1
- Version 9.5.0StatusaffectedConstraints<=9.5.8
- Version 9.9.0StatusaffectedConstraints<=9.9.2
- Version 9.10.2StatusunaffectedConstraints-
- Version 9.11.0StatusunaffectedConstraints-
- Version 9.5.9StatusunaffectedConstraints-
- Version 9.9.3StatusunaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mattermost | Mattermost | unaffected |
|
- ≥ 9.5.0 · < 9.5.9
- ≥ 9.9.0 · < 9.9.3
- ≥ 9.10.0 · < 9.10.2
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
Vendor solution
Update Mattermost to versions 9.11.0, 9.10.2, 9.9.3, 9.5.9 or higher.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Sep 26, 2024 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2024–2026- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (5 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.26% (0.00259) | 15.96th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.25% (0.00252) | 16.29th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.06% (0.00063) | 16.78th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00043) | 10.81th | v3 (v2023.03.01) |
| Sep 27, 2024 | 0.04% (0.00043) | 9.60th | v3 (v2023.03.01) |
References (1)
- https://mattermost.com/security-updates Vendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://mattermost.com/security-updates | Vendor Advisory |
Change history (0)
No recorded changes yet.