CVE-2024-39777 | BDVDB-2026-244376 Detail

MattermostMattermost

Description#

Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6, 9.7.x <= 9.7.5 and 9.8.x <= 9.8.1 fail to disallow unsolicited invites to expose access to local channels, when shared channels are enabled, which allows a malicious remote to send an invite with the ID of an existing local channel, and that local channel will then become shared without the consent of the local admin.

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact none. Attack vector: network.

Weaknesses#

CWE-284 Improper Access Control

References#

https://mattermost.com/security-updates

Exploit#

No public exploit known

History#

Version 12024-08-01Record published in the CVE List.

Published

Published: 2024-08-01
Last modified: 2024-08-01

Vendor information

Vendor: Mattermost
Product: Mattermost

All Mattermost vulnerabilities

Score

8.7 High

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 30.4.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Improper Access Control

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
9.9.0
Fixed
Not stated
Vulnerable
>= 9.5.0 and <= 9.5.6
Fixed
Not stated
Vulnerable
>= 9.7.0 and <= 9.7.5
Fixed
Not stated
Vulnerable
>= 9.8.0 and <= 9.8.1
Fixed
Not stated
Vulnerable
Not stated
Fixed
9.10.0
Vulnerable
Not stated
Fixed
9.9.1
Vulnerable
Not stated
Fixed
9.5.7
Vulnerable
Not stated
Fixed
9.7.6

Scoring System

CVSS v4.0

Not available

CVSS v3.1

8.7 High

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	High
User Interaction	None
Scope	Changed
Confidentiality	High
Integrity	High
Availability	None

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).