Description
The cross-site scripting (XSS) vulnerability in Zyxel ATP series firmware versions 4.32 through 5.35, USG FLEX series firmware versions 4.50 through 5.35, USG FLEX 50(W) firmware versions 4.16 through 5.35, USG20(W)-VPN firmware versions 4.16 through 5.35, and VPN series firmware versions 4.30 through 5.35, which could allow an authenticated attacker with administrator privileges to store malicious scripts in a vulnerable device. A successful XSS attack could then result in the stored malicious scripts being executed when the user visits the Logs page of the GUI on the device.
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Affected products
- Zyxel / ATP series firmware4.32 through 5.35 – 4.32 through 5.35
- Zyxel / USG20(W)-VPN firmware4.16 through 5.35 – 4.16 through 5.35
- Zyxel / USG FLEX 50(W) firmware4.16 through 5.35 – 4.16 through 5.35
- Zyxel / USG FLEX series firmware4.50 through 5.35 – 4.50 through 5.35
- Zyxel / VPN series firmware4.30 through 5.35 – 4.30 through 5.35