CVSS 3.0
6.1 mediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NCVE-2019-9955
Medium (6.1) in zyxel. EPSS 21% chance of exploitation in the next 30 days.
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.
Severity
- EPSS
- 21% chance of exploitation in the next 30 days; higher than 97% of CVEs (scores of 2026-10-31)
- CWE
- CWE-79
- Published
- Modified
- Record from
- the NVD, synced
Affected
- zyxel:atp200_firmware
- zyxel:atp500_firmware
- zyxel:atp800_firmware
- zyxel:usg1100_firmware
- zyxel:usg110_firmware
- zyxel:usg1900_firmware
- zyxel:usg20-vpn_firmware
- zyxel:usg20w-vpn_firmware
- zyxel:usg210_firmware
- zyxel:usg2200-vpn_firmware
- zyxel:usg310_firmware
- zyxel:usg40_firmware
- zyxel:usg40w_firmware
- zyxel:usg60_firmware
- zyxel:usg60w_firmware
- zyxel:vpn100_firmware
- zyxel:vpn300_firmware
- zyxel:vpn50_firmware
- zyxel:zywall_1100_firmware
- zyxel:zywall_110_firmware
- zyxel:zywall_310_firmware
References
- http://packetstormsecurity.com/files/152525/Zyxel-ZyWall-Cross-Site-Scripting.html
- http://seclists.org/fulldisclosure/2019/Apr/22
- https://www.exploit-db.com/exploits/46706/
- https://www.securitymetrics.com/blog/Zyxel-Devices-Vulnerable-Cross-Site-Scripting-Login-page
- https://www.zyxel.com/support/reflected-cross-site-scripting-vulnerability-of-firewalls.shtml