title: Reflected XSS in the backurl parameter of Zabbix Frontend
description: An unauthenticated user can create a link with reflected Javascript code inside the backurl parameter and send it to other authenticated users in order to create a fake account with predefined login, password and role in Zabbix Frontend.
problem types: CWE-79 Cross-site Scripting (XSS)
affected:
{
product: Frontend
vendor: Zabbix
versions:
status: affected, version: 6.0.0-6.0.6
status: affected, version: 6.2.0
lessThan: unspecified, status: unaffected, version: 6.0.7rc1, versionType: custom
lessThan: unspecified, status: unaffected, version: 6.2.1rc1, versionType: custom
}
metrics:
cvssV3_1: [
attackComplexity: HIGH
attackVector: NETWORK
availabilityImpact: NONE
baseScore: 4.8
baseSeverity: MEDIUM
confidentialityImpact: HIGH
integrityImpact: LOW
privilegesRequired: HIGH
scope: UNCHANGED
userInteraction: REQUIRED
vectorString: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:L/A:N
version: 3.1
]
solutions: To remediate this vulnerability, apply the updates
workarounds: The vulnerability can be exploited only by authenticated users. If an immediate update is not possible, review user access rights to your Zabbix Frontend, be attentive to browser warnings and always check any links you can receive via email or other means of communication, which lead to Zabbix Frontend and contain suspicious parameters with special symbols.