CVE-2019-9955

medium

Description

On Zyxel ATP200, ATP500, ATP800, USG20-VPN, USG20W-VPN, USG40, USG40W, USG60, USG60W, USG110, USG210, USG310, USG1100, USG1900, USG2200-VPN, ZyWALL 110, ZyWALL 310, ZyWALL 1100 devices, the security firewall login page is vulnerable to Reflected XSS via the unsanitized 'mp_idx' parameter.

References

https://www.securitymetrics.com/blog/Zyxel-Devices-Vulnerable-Cross-Site-Scripting-Login-page

http://seclists.org/fulldisclosure/2019/Apr/22

https://www.exploit-db.com/exploits/46706/

https://www.zyxel.com/support/reflected-cross-site-scripting-vulnerability-of-firewalls.shtml

http://packetstormsecurity.com/files/152525/Zyxel-ZyWall-Cross-Site-Scripting.html

Details

Source: Mitre, NVD

Published: 2019-04-22

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 4.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 6.1

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Severity: Medium

EPSS

EPSS: 0.2095