CVE-2024-29215

Slash commands run in channel without channel membership via playbook task commands

MEDIUM

4.3

CVSS Score

Published: May 26, 2024 at 01:33 PM UTC

Updated: June 17, 2026 at 07:22 AM UTC

2 products affected across 1 vendorMattermost ServerMattermost

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Severity

MEDIUM4.3

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

Description

Mattermost versions 9.5.x <= 9.5.3, 9.7.x <= 9.7.1, 9.6.x <= 9.6.1, 8.1.x <= 8.1.12 fail to enforce proper access control which allows a user to run a slash command in a channel they are not a member of via linking a playbook run to that channel and running a slash command as a playbook task command.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Mattermost Server · Mattermost

95%

8.1.0 ≤ v < 8.1.139.5.0 ≤ v < 9.5.49.6.0 ≤ v < 9.6.29.7.0 ≤ v < 9.7.2

Affected range stops below 8.1.13, so it looks safe — our inference, not a vendor statement

Affected range stops below 9.5.4, so it looks safe — our inference, not a vendor statement

Affected range stops below 9.6.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 9.7.2, so it looks safe — our inference, not a vendor statement

Mattermost · Mattermost

60%

8.1.0 ≤ v ≤ 8.1.129.5.0 ≤ v ≤ 9.5.39.6.0 ≤ v ≤ 9.6.19.7.0 ≤ v ≤ 9.7.18.1.0 9.5.0 9.6.0 9.7.0

Vendor states this is fixed in 8.1.13 (unaffected)

Vendor states this is fixed in 9.5.4 (unaffected)

Vendor states this is fixed in 9.6.2 (unaffected)

Vendor states this is fixed in 9.7.2 (unaffected)

Vendor states this is fixed in 9.8.0 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://mattermost.com/security-updates

References (1)

Vendor Advisory

Source: [email protected]

https://mattermost.com/security-updates

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.3MEDIUMMattermost

Attack Vector: NETWORK
Complexity: LOW
Privileges: LOW
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: LOW
Availability: NONE

Vector?

Quick Info

StatusANALYZED

CWE

CWE-284

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