Description
A reflected cross-site scripting (XSS) vulnerability in the CGI program "dynamic_script.cgi" of Zyxel ATP series firmware versions from V4.32 through V5.38, USG FLEX series firmware versions from V4.50 through V5.38, USG FLEX 50(W) series firmware versions from V4.16 through V5.38, and USG20(W)-VPN series firmware versions from V4.16 through V5.38 could allow an attacker to trick a user into visiting a crafted URL with the XSS payload. The attacker could obtain browser-based information if the malicious script is executed on the victim’s browser.
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Affected products
- Zyxel / ATP series firmwareversions V4.32 through V5.38 – versions V4.32 through V5.38
- Zyxel / USG20(W)-VPN series firmwareversions V4.16 through V5.38 – versions V4.16 through V5.38
- Zyxel / USG FLEX 50(W) series firmwareversions V4.16 through V5.38 – versions V4.16 through V5.38
- Zyxel / USG FLEX series firmwareversions V4.50 through V5.38 – versions V4.50 through V5.38