title: Server crash via a specially crafted markdown input
description: Mattermost fails to properly validate markdown, allowing an attacker to crash the server via a specially crafted markdown input.
problem types: CWE-400 Uncontrolled Resource Consumption
affected:
{
defaultStatus: unaffected
product: Mattermost
vendor: Mattermost
versions:
lessThanOrEqual: 7.8.6, status: affected, version: 0, versionType: semver
lessThanOrEqual: 7.9.4, status: affected, version: 0, versionType: semver
lessThanOrEqual: 7.10.2, status: affected, version: 0, versionType: semver
status: unaffected, version: 7.8.7
status: unaffected, version: 7.9.5
status: unaffected, version: 7.10.3
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: LOW
baseScore: 4.3
baseSeverity: MEDIUM
confidentialityImpact: NONE
integrityImpact: NONE
privilegesRequired: LOW
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
version: 3.1
]
format: CVSS
scenarios: GENERAL
solutions: Update Mattermost to versions v7.8.7, v7.9.5, v7.10.3 or higher