CVE-2023-46701Network attack vector

Post information disclosure via unchecked post identifier

Published Dec 12, 2023 · Updated Aug 2, 2024

Authorization bypass in affected Mattermost releases allows remote authenticated users to read limited data from inaccessible posts. The Playbooks add-to-timeline-dialog endpoint accepts a caller-supplied post ID and builds the dialog without checking whether the caller can access that post. Exploitation requires a valid account and a known post ID; exposure is limited to post information, with no reported write or service-interruption impact.

CVSS severity6.5
Medium
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in affected Mattermost releases allows remote authenticated users to read limited data from inaccessible posts. The Playbooks add-to-timeline-dialog endpoint accepts a caller-supplied post ID and builds the dialog without checking whether the caller can access that post. Exploitation requires a valid account and a known post ID; exposure is limited to post information, with no reported write or service-interruption impact.

The record

CVE
CVE-2023-46701
Published
Dec 12, 2023
Updated
Aug 2, 2024
Vendor
Mattermost
Product
Mattermost
Classifications
CWE-200, T1213.005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 12, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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 <=8.1.5
  2. Affected versionversion=0 <=9.0.3
  3. Affected versionversion=0 <=9.1.2
  4. Affected versionversion=0 <=9.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Mattermost · Mattermostversion=0 <=8.1.5; version=0 <=9.0.3; version=0 <=9.1.2; version=0 <=9.2.1

Published CVSS scores

6.5Mattermost, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
5.3NIST NVDCVSS:3.1/AV:N/AC:L/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 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
T1213.005Data from Information Repositories: Messaging Applications

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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