title: Reflected XSS in action configuration window of Zabbix Frontend
description: An authenticated user can create a link with reflected XSS payload for actions’ pages, and send it to other users. Malicious code has access to all the same objects as the rest of the web page and can make arbitrary modifications to the contents of the page being displayed to a victim. This attack can be implemented with the help of social engineering and expiration of a number of factors - an attacker should have authorized access to the Zabbix Frontend and allowed network connection between a malicious server and victim’s computer, understand attacked infrastructure, be recognized by the victim as a trustee and use trusted communication channel.
problem types: CWE-79 Cross-site Scripting (XSS)
affected:
{
vendor: Zabbix
product: Frontend
versions:
version: 4.0.0-4.0.38, status: affected
version: 5.0.0-5.0.20, status: affected
version: 5.4.0-5.4.10, status: affected
version: 6.0, status: affected
version: 4.0.39rc1, status: unaffected, lessThan: unspecified, versionType: custom
version: 5.0.21rc1, status: unaffected, lessThan: unspecified, versionType: custom
version: 5.4.11rc1, status: unaffected, lessThan: unspecified, versionType: custom
version: 6.0.1rc1, status: unaffected, lessThan: unspecified, versionType: custom
}
metrics:
cvssV3_1: [
version: 3.1
vectorString: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L
attackVector: NETWORK
attackComplexity: HIGH
privilegesRequired: LOW
userInteraction: REQUIRED
scope: UNCHANGED
confidentialityImpact: LOW
integrityImpact: LOW
availabilityImpact: LOW
baseScore: 4.6
baseSeverity: MEDIUM
]
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 the actionconf.php page of Zabbix Frontend and contain suspicious parameters with special symbols. If you have clicked on the suspicious link, do not fill out the opened form.