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CVE-2024-39274

HIGH
Published 2024-08-01T14:05:02.518Z
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CVSS Score

V3.1
8.7
/10
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.001
probability
of exploitation in the wild

There is a 0.1% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.350
Higher than 35.0% of all CVEs

Attack Vector Metrics

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED

Impact Metrics

Confidentiality
HIGH
Integrity
HIGH
Availability
NONE

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 properly validate that the channel that comes from the sync message is a shared channel, when shared channels are enabled, which allows a malicious remote to add users to arbitrary teams and channels

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

Mattermost

Mattermost

Affected Versions:

9.9.0 9.5.0 9.7.0 9.8.0 9.10.0 9.9.1 9.5.7 9.7.6 9.8.2
mattermost

mattermost

Affected Versions:

9.9.0
mattermost

mattermost

Affected Versions:

9.5.0 9.7.0 9.8.0
mattermost

mattermost

Affected Versions:

9.10.0
mattermost

mattermost

Affected Versions:

9.9.1
mattermost

mattermost

Affected Versions:

9.5.7
mattermost

mattermost

Affected Versions:

9.7.6
mattermost

mattermost

Affected Versions:

9.8.2

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

✓ GitHub Reviewed CRITICAL

Mattermost failed to properly validate that the channel that comes from the sync message is a shared channel

GHSA-cmc8-222c-vqp9

Advisory Details

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 properly validate that the channel that comes from the sync message is a shared channel, when shared channels are enabled, which allows a malicious remote to add users to arbitrary teams and channels

Affected Packages

Go github.com/mattermost/mattermost/server/v8
ECOSYSTEM: ≥9.5.0 <9.5.7
Go github.com/mattermost/mattermost/server/v8
ECOSYSTEM: ≥9.7.0 <9.7.6
Go github.com/mattermost/mattermost/server/v8
ECOSYSTEM: ≥9.8.0 <9.8.2
Go github.com/mattermost/mattermost/server/v8
ECOSYSTEM: ≥9.9.0 <9.9.1

CVSS Scoring

CVSS Score

9.0

CVSS Vector

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

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2024-39274
PACKAGE https://github.com/mattermost/mattermost
WEB https://mattermost.com/security-updates
WEB https://pkg.go.dev/vuln/GO-2024-3028

Advisory provided by GitHub Security Advisory Database. Published: August 1, 2024, Modified: November 18, 2024

References

https://mattermost.com/security-updates
Published: 2024-08-01T14:05:02.518Z
Last Modified: 2024-08-02T15:10:58.701Z
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