title: ScreenOS: XSS vulnerability in ScreenOS Firewall
description: A reflected cross site scripting vulnerability in NetScreen WebUI of Juniper Networks Juniper NetScreen Firewall+VPN running ScreenOS allows a network based attacker to inject HTML/JavaScript content into the management session of other users including the administrator. This enables the attacker to effectively execute commands with the permissions of an administrator. This issue affects Juniper Networks ScreenOS 6.3.0 releases prior to 6.3.0r24 on SSG Series. No other Juniper Networks products or platforms are affected by this issue.
problem types: reflected cross site scripting vulnerability
affected:
{
platforms: SSG Series
product: ScreenOS
vendor: Juniper Networks
versions:
status: affected, version: 6.3.0 prior to 6.3.0r24
}
metrics:
cvssV3_0: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 9.6
baseSeverity: CRITICAL
confidentialityImpact: HIGH
integrityImpact: HIGH
privilegesRequired: NONE
scope: CHANGED
userInteraction: REQUIRED
vectorString: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
version: 3.0
]
workarounds: Use access lists or firewall filters to limit access to the firewall's WebUI only from trusted hosts.