description: Mattermost versions 8.1.x before 8.1.10, 9.2.x before 9.2.6, 9.3.x before 9.3.2, and 9.4.x before 9.4.3 fail to limit the number of @-mentions processed per message, allowing an authenticated attacker to crash the client applications of other users via large, crafted messages.
problem types: CWE-400: Uncontrolled Resource Consumption
affected:
{
defaultStatus: unaffected
product: Mattermost
vendor: Mattermost
versions:
lessThanOrEqual: 9.4.2, status: affected, version: 9.4.0, versionType: semver
lessThanOrEqual: 9.3.1, status: affected, version: 9.3.0, versionType: semver
lessThanOrEqual: 9.2.5, status: affected, version: 9.2.0, versionType: semver
lessThanOrEqual: 8.1.9, status: affected, version: 8.1.0, versionType: semver
status: unaffected, version: 9.5.0
status: unaffected, version: 9.4.3
status: unaffected, version: 9.3.2
status: unaffected, version: 9.2.6
status: unaffected, version: 8.1.10
}
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 Server to versions 9.5, 9.4.3, 9.3.2, 9.2.6, 8.1.10 or higher.