CVE-2019-9955

MEDIUM NUCLEI

Zyxel - ZyWALL < Various - XSS

Title source: llm

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.

Exploits (1)

exploitdb WORKING POC

by Aaron Bishop · textwebappshardware

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

View Code ZIP pw:eip

Nuclei Templates (1)

Zyxel - Cross-Site Scripting

MEDIUMby pdteam

References (5)

[Exploit, Third Party Advisory, VDB Entry] http://packetstormsecurity.com/files/152525/Zyxel-ZyWall-Cross-Site-Scripting.html

[Mailing List, Third Party Advisory] http://seclists.org/fulldisclosure/2019/Apr/22

[Exploit, Third Party Advisory, VDB Entry] https://www.exploit-db.com/exploits/46706/

[Patch, Third Party Advisory] https://www.securitymetrics.com/blog/Zyxel-Devices-Vulnerable-Cross-Site-Scripting-Login-page

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

Scores

CVSS v3 6.1

EPSS 0.1070

EPSS Percentile 93.4%

Attack Vector NETWORK

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

Details

CWE

CWE-79

Status published

Products (21)

zyxel/atp200_firmware 4.31

zyxel/atp500_firmware 4.31

zyxel/atp800_firmware 4.31

zyxel/usg1100_firmware 4.31

zyxel/usg110_firmware 4.31

zyxel/usg1900_firmware 4.31

zyxel/usg20-vpn_firmware 4.31

zyxel/usg20w-vpn_firmware 4.31

zyxel/usg210_firmware 4.31

zyxel/usg2200-vpn_firmware 4.31

... and 11 more

Published Apr 22, 2019

Tracked Since Feb 18, 2026