CVE-2019-9955

EPSS 20.9%

Vexday Risk Score

43Attention

SSVC decision (CISA)

Attend

PoC available → attend closely

Exploit maturity

Functional exploit

Automatable exploit available (Nuclei/Metasploit).

CVSS —EPSS 20.9%KEV nãoPoC públicaNuclei simMetasploit —Patch —

Lifecycle

16 Apr 2019Public PoC

22 Apr 2019Published on NVD

Recommendation: Plan a near-term fix — a public PoC already exists.

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.

Affected products

n/a · n/a

public PoCs found — 3

cve_referencepacketstormsecurity.com/files/152525/Zyxel-ZyWall-Cross-Site-Scripting.htmlunverified cve_referencewww.exploit-db.com/exploits/46706/unverified exploitdbwww.exploit-db.com/exploits/46706unverified

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

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