Mattermost up to 8.1.12/9.5.3/9.6.1 Slash Command cross-site request forgery

CVSS Meta Temp Score
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CTI Interest Score
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4.9$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in Mattermost up to 8.1.12/9.5.3/9.6.1. Affected is an unknown function of the component Slash Command Handler. Executing a manipulation can lead to cross-site request forgery. This vulnerability is registered as CVE-2024-36255. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic was found in Mattermost up to 8.1.12/9.5.3/9.6.1. This vulnerability affects an unknown code block of the component Slash Command Handler. The manipulation with an unknown input leads to a cross-site request forgery vulnerability. The CWE definition for the vulnerability is CWE-352. The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request. As an impact it is known to affect integrity. CVE summarizes:

Mattermost versions 9.5.x <= 9.5.3, 9.6.x <= 9.6.1 and 8.1.x <= 8.1.12 fail to perform proper input validation on post actions which allows an attacker to run a playbook checklist task command as another user via creating and sharing a deceptive post action that unexpectedly runs a slash command in some arbitrary channel.

The weakness was published by Juho Nurminen. The advisory is shared for download at mattermost.com. This vulnerability was named CVE-2024-36255 since 05/23/2024. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available.

Upgrading to version 8.1.13, 9.5.4, 9.6.2 or 9.7.0 eliminates this vulnerability.

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Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.0
VulDB Meta Temp Score: 4.9

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 5.7
CNA Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross-site request forgery
CWE: CWE-352 / CWE-862 / CWE-863
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Mattermost 8.1.13/9.5.4/9.6.2/9.7.0

Timelineinfo

05/23/2024 🔍
05/26/2024 +3 days 🔍
05/26/2024 +0 days 🔍
09/30/2025 +492 days 🔍

Sourcesinfo

Advisory: mattermost.com
Researcher: Juho Nurminen
Status: Confirmed

CVE: CVE-2024-36255 (🔍)
GCVE (CVE): GCVE-0-2024-36255
GCVE (VulDB): GCVE-100-266320

Entryinfo

Created: 05/26/2024 15:59
Updated: 09/30/2025 17:54
Changes: 05/26/2024 15:59 (63), 03/28/2025 01:47 (5), 09/30/2025 17:54 (1)
Complete: 🔍
Cache ID: 216::103

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