{"cve":"CVE-2004-0091","nvd":{"published":"2004-02-17T05:00:00.000","modified":"2026-06-16T22:04:55.317","status":"Modified","description":"NOTE: this issue has been disputed by the vendor.  Cross-site scripting (XSS) vulnerability in register.php for unknown versions of vBulletin allows remote attackers to inject arbitrary HTML or web script via the reg_site (or possibly regsite) parameter.  NOTE: the vendor has disputed this issue, saying \"There is no hidden field called 'reg_site', nor any $reg_site variable anywhere in the vBulletin 2 or vBulletin 3 source code or templates, nor has it ever existed.  We can only assume that this vulnerability was found in a site running code modified from that supplied by Jelsoft.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["http://marc.info/?l=bugtraq&m=107462349324945&w=2","http://marc.info/?l=vuln-dev&m=107462499927040&w=2","http://marc.info/?l=vuln-dev&m=107478592401619&w=2","http://marc.info/?l=vuln-dev&m=107488880317647&w=2","http://securitytracker.com/id?1008780"],"products":["jelsoft:vbulletin"],"source":"nvd","synced_at":"2026-10-19T19:37:11.487553034+00:00"},"epss":{"cve":"CVE-2004-0091","score":0.01208,"percentile":0.68395,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}