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CVE-2023-5339

Mattermost Desktop logs all keystrokes during initial run after fresh installation 

MEDIUM
5.5
CVSS Score
Published: October 17, 2023 at 09:30 AM UTC
Updated: June 17, 2026 at 06:48 AM UTC
2 products affected across 1 vendorMattermost DesktopMattermost

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

Description

Mattermost Desktop fails to set an appropriate log level during initial run after fresh installation resulting in logging all keystrokes including password entry being logged.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Mattermost Desktop· Mattermost
95%
v ≤ 5.4.0
Mattermost· Mattermost
60%
v ≤ 5.4.0
Vendor states this is fixed in 5.5.0 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: [email protected]
https://mattermost.com/security-updates

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.5MEDIUM[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-200CWE-532

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