Vulnerability 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 Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Zyxel | Atp200 Firmware | >= 4.32, < 5.36 |
| Zyxel | Atp200 | - |
| Zyxel | Atp100 Firmware | >= 4.32, < 5.36 |
| Zyxel | Atp100 | - |
| Zyxel | Atp700 Firmware | >= 4.32, < 5.36 |
| Zyxel | Atp700 | - |
| Zyxel | Atp500 Firmware | >= 4.32, < 5.36 |
| Zyxel | Atp500 | - |
| Zyxel | Atp100W Firmware | >= 4.32, < 5.36 |
| Zyxel | Atp100W | - |
| Zyxel | Atp800 Firmware | >= 4.32, < 5.36 |
| Zyxel | Atp800 | - |
| Zyxel | Usg Flex 100 Firmware | >= 4.50, < 5.36 |
| Zyxel | Usg Flex 100 | - |
| Zyxel | Usg Flex 50 Firmware | >= 4.50, < 5.36 |
| Zyxel | Usg Flex 50 | - |
| Zyxel | Usg Flex 200 Firmware | >= 4.50, < 5.36 |
| Zyxel | Usg Flex 200 | - |
| Zyxel | Usg Flex 500 Firmware | >= 4.50, < 5.36 |
| Zyxel | Usg Flex 500 | - |
Related Weaknesses (CWE)
References
- https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisVendor Advisory
- https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisVendor Advisory
FAQ
What is CVE-2023-27990?
CVE-2023-27990 is a vulnerability with a CVSS score of 4.8 (MEDIUM). 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...
How severe is CVE-2023-27990?
CVE-2023-27990 has been rated MEDIUM with a CVSS base score of 4.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-27990?
Check the references section above for vendor advisories and patch information. Affected products include: Zyxel Atp200 Firmware, Zyxel Atp200, Zyxel Atp100 Firmware, Zyxel Atp100, Zyxel Atp700 Firmware.