CVE-2023-5875Network attack vector

Unauthenticated media access via unprompted permissions

Published Nov 2, 2023 · Updated Sep 5, 2024

Protection mechanism failure in Mattermost Desktop 5.5.0 and earlier allows remote attackers to access local media through a malicious server. Mattermost has not disclosed the affected code locus, but states that the client mishandles sensitive permission requests and omits the consent prompt. Exploitation requires the desktop client to connect to a malicious Mattermost server and exposes media without user interaction.

CVSS severity3.7
Low
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Protection mechanism failure in Mattermost Desktop 5.5.0 and earlier allows remote attackers to access local media through a malicious server. Mattermost has not disclosed the affected code locus, but states that the client mishandles sensitive permission requests and omits the consent prompt. Exploitation requires the desktop client to connect to a malicious Mattermost server and exposes media without user interaction.

The record

CVE
CVE-2023-5875
Published
Nov 2, 2023
Updated
Sep 5, 2024
Vendor
Mattermost
Product
Mattermost Desktop
Classifications
CWE-693, T1123, T1125
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 2, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 5, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=5.5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mattermost · Mattermost Desktopversion=0 <=5.5.0

Published CVSS scores

5.3NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
3.7MattermostCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-693Protection Mechanism Failure
T1123Audio Capture
T1125Video Capture

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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