title: ScreenOS: XSS vulnerability in ScreenOS Firewall
description: A persistent cross site scripting vulnerability in NetScreen WebUI of Juniper Networks Juniper NetScreen Firewall+VPN running ScreenOS allows a user with the 'security' role to inject HTML/JavaScript content into the management session of other users including the administrator. This enables the lower-privileged user 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: persistent 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: 8.4
baseSeverity: HIGH
confidentialityImpact: HIGH
integrityImpact: HIGH
privilegesRequired: HIGH
scope: CHANGED
userInteraction: REQUIRED
vectorString: CVSS:3.0/AV:N/AC:L/PR:H/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.