{"id":"CVE-2019-9955","aliases":["EUVD-2019-19309","GHSA-9r2m-gm27-q4jp"],"status":"published","title":"On Zyxel ATP200, ATP500, ATP800, USG20-VPN, USG20W-VPN, USG40, USG40W, USG60, USG60W, USG110,...","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.","severity":{"version":"3.0","score":6.1,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.2118,"percentile":0.97602,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-79"],"published":"2019-04-22T19:38:59Z","modified":"2026-06-17T02:44:55Z","exploits":[{"source":"exploitdb","id":"EDB-46706","title":"Zyxel ZyWall 310 / ZyWall 110 / USG1900 / ATP500 / USG40 - Login Page Cross-Site Scripting","type":"webapps","platform":"hardware","date":"2019-04-16","url":"https://www.exploit-db.com/exploits/46706"},{"source":"nuclei","id":"CVE-2019-9955","title":"Zyxel - Cross-Site Scripting","type":"detection template","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2019/CVE-2019-9955.yaml"}],"products":[{"vendor":"zyxel","product":"atp200_firmware"},{"vendor":"zyxel","product":"atp500_firmware"},{"vendor":"zyxel","product":"atp800_firmware"},{"vendor":"zyxel","product":"usg1100_firmware"},{"vendor":"zyxel","product":"usg110_firmware"},{"vendor":"zyxel","product":"usg1900_firmware"},{"vendor":"zyxel","product":"usg20-vpn_firmware"},{"vendor":"zyxel","product":"usg20w-vpn_firmware"},{"vendor":"zyxel","product":"usg210_firmware"},{"vendor":"zyxel","product":"usg2200-vpn_firmware"},{"vendor":"zyxel","product":"usg310_firmware"},{"vendor":"zyxel","product":"usg40_firmware"},{"vendor":"zyxel","product":"usg40w_firmware"},{"vendor":"zyxel","product":"usg60_firmware"},{"vendor":"zyxel","product":"usg60w_firmware"},{"vendor":"zyxel","product":"vpn100_firmware"},{"vendor":"zyxel","product":"vpn300_firmware"},{"vendor":"zyxel","product":"vpn50_firmware"},{"vendor":"zyxel","product":"zywall_1100_firmware"},{"vendor":"zyxel","product":"zywall_110_firmware"},{"vendor":"zyxel","product":"zywall_310_firmware"}],"references":[{"url":"https://www.securitymetrics.com/blog/Zyxel-Devices-Vulnerable-Cross-Site-Scripting-Login-page","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory"]},{"url":"http://seclists.org/fulldisclosure/2019/Apr/22","tags":["mailing-list","x_refsource_FULLDISC","x_transferred","Mailing List","Third Party Advisory"]},{"url":"https://www.exploit-db.com/exploits/46706/","tags":["exploit","x_refsource_EXPLOIT-DB","x_transferred","Exploit","Third Party Advisory","VDB Entry"]},{"url":"http://packetstormsecurity.com/files/152525/Zyxel-ZyWall-Cross-Site-Scripting.html","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","VDB Entry"]},{"url":"https://www.zyxel.com/support/reflected-cross-site-scripting-vulnerability-of-firewalls.shtml","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-9955"},{"url":"https://www.exploit-db.com/exploits/46706"},{"url":"https://github.com/advisories/GHSA-9r2m-gm27-q4jp"}],"sources":{"cve":[{"id":"CVE-2019-9955","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.","status":"published","published":"2019-04-22T19:38:59Z","modified":"2024-08-04T22:10:08.67Z","updated_at":"2026-11-02T14:20:20.081405Z"}],"euvd":[{"id":"EUVD-2019-19309","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.","status":"published","published":"2019-04-22T19:38:59Z","modified":"2024-08-04T22:10:08Z","updated_at":"2026-11-03T02:40:54.59684Z"}],"ghsa":[{"id":"GHSA-9r2m-gm27-q4jp","title":"On Zyxel ATP200, ATP500, ATP800, USG20-VPN, USG20W-VPN, USG40, USG40W, USG60, USG60W, USG110,...","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.","status":"published","published":"2022-05-24T16:44:09Z","modified":"2024-04-04T00:03:40Z","cvss":[{"version":"3.0","score":6.1,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:55:48.925076Z"}],"nvd":[{"id":"CVE-2019-9955","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.","status":"published","published":"2019-04-22T20:29:00.447Z","modified":"2026-06-17T02:44:55.413Z","cvss":[{"version":"3.0","score":6.1,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:05:12.471695Z"}]}}