title: Reflected XSS in Mattermost Jira plugin
description: Mattermost Jira plugin versions shipped with 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 escape user-controlled outputs when generating HTML pages, which allows an attacker to perform reflected cross-site scripting attacks against the users of the Mattermost server.
problem types: CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
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: NONE
baseScore: 6.1
baseSeverity: MEDIUM
confidentialityImpact: LOW
integrityImpact: LOW
privilegesRequired: NONE
scope: CHANGED
userInteraction: REQUIRED
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
version: 3.1
]
format: CVSS
scenarios: GENERAL
solutions: Update Mattermost to versions 8.1.0, 9.3.2, 9.4.3, 9.5.0 or higher.