CVE-2023-2281Network attack vector

Archived-team data disclosure via unsanitized WebSocket event

Published Apr 25, 2023 · Updated Dec 6, 2024

Information disclosure in Mattermost before 7.9 allows remote authenticated users to view archived-team metadata over WebSockets. The team-archive path publishes an unsanitized team object in the related WebSocket event, exposing its name, display name, description, and other fields to connected clients. A valid account, an open WebSocket connection, and a concurrent administrator-initiated team archive are required; the disclosed data is limited to archived-team metadata.

CVSS severity3.1
Low
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Mattermost before 7.9 allows remote authenticated users to view archived-team metadata over WebSockets. The team-archive path publishes an unsanitized team object in the related WebSocket event, exposing its name, display name, description, and other fields to connected clients. A valid account, an open WebSocket connection, and a concurrent administrator-initiated team archive are required; the disclosed data is limited to archived-team metadata.

The record

CVE
CVE-2023-2281
Published
Apr 25, 2023
Updated
Dec 6, 2024
Vendor
Mattermost
Product
Mattermost
Classifications
CWE-200, T1213.005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 25, 2023CVE publishedPublication date reported by the CVE source.
  2. Dec 6, 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 <7.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Mattermost · Mattermostversion=0 <7.9

Published CVSS scores

3.1MattermostCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1213.005Messaging Applications

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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