Mattermost up to 6.3.8/6.4.x/6.5.1/6.6.1/6.7.0 Legacy Slack Import resource consumption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability has been found in Mattermost up to 6.3.8/6.4.x/6.5.1/6.6.1/6.7.0 and classified as problematic. Affected by this vulnerability is an unknown function of the component Legacy Slack Import. The manipulation with an unknown input leads to a resource consumption vulnerability. The CWE definition for the vulnerability is CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. As an impact it is known to affect availability. The summary by CVE is:

The legacy Slack import feature in Mattermost version 6.7.0 and earlier fails to properly limit the sizes of imported files, which allows an authenticated attacker to crash the server by importing large files via the Slack import REST API.

The weakness was disclosed 07/15/2022. The advisory is shared at This vulnerability is known as CVE-2022-2406 since 07/14/2022. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

Upgrading to version 6.3.9, 6.5.2, 6.6.2 or 6.7.1 eliminates this vulnerability.

The entries VDB-226929, VDB-227383, VDB-230148 and VDB-231730 are pretty similar.





CPE 2.3info

CPE 2.2info


VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍


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

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

NVD Base Score: 6.5
NVD Vector: 🔍

CNA Base Score: 4.3
CNA Vector (Mattermost, Inc.): 🔍



VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍


Class: Resource consumption
CWE: CWE-400 / CWE-404

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Threat Intelligenceinfo

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


Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Mattermost 6.3.9/6.5.2/6.6.2/6.7.1


07/14/2022 🔍
07/15/2022 +1 days 🔍
07/15/2022 +0 days 🔍
04/14/2023 +273 days 🔍


Status: Confirmed

CVE: CVE-2022-2406 (🔍)
See also: 🔍


Created: 07/15/2022 07:21 AM
Updated: 04/14/2023 03:06 PM
Changes: 07/15/2022 07:21 AM (47), 07/31/2022 01:42 PM (18), 04/14/2023 03:06 PM (10)
Complete: 🔍
Cache ID: 44:AE1:40


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