Home/CVE/Mattermost fails to properly check the creator of an attached file when adding the file to a draft post, potentially ex
CVE

CVE-2023-5331

Mattermost fails to properly check the creator of an attached file when adding the file to a draft post, potentially ex

Mattermost fails to properly check the creator of an attached file when adding the file to a draft post, potentially exposing unauthorized file information.

MEDIUM · CVSS 4.3 EPSS 0.00167
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-862Missing Authorization
CWE-862Missing Authorization
▤

Affected Products & Versions

3
mattermost server< 7.8.11
mattermost server>= 8.0.0 and < 8.0.3
mattermost server>= 8.1.0 and < 8.1.2
▣

Scoring & Timeline

4.3
MEDIUM · CVSS v3.1 · responsibledisclosure@mattermost.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD09 Oct 2023 · 11:15 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://mattermost.com/security-updatesVendor Advisory
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