{"cve":"CVE-2001-1013","nvd":{"published":"2001-09-12T04:00:00.000","modified":"2026-06-16T21:55:24.740","status":"Modified","description":"Apache on Red Hat Linux with with the UserDir directive enabled generates different error codes when a username exists and there is no public_html directory and when the username does not exist, which could allow remote attackers to determine valid usernames on the server.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["http://archives.neohapsis.com/archives/vuln-dev/2000-q3/0083.html","http://archives.neohapsis.com/archives/vuln-dev/2000-q3/0087.html","http://archives.neohapsis.com/archives/vuln-dev/2000-q3/0094.html","http://www.securityfocus.com/archive/1/213667","http://www.securityfocus.com/bid/3335"],"products":["redhat:linux"],"source":"nvd","synced_at":"2026-10-19T19:33:02.361923049+00:00"},"epss":{"cve":"CVE-2001-1013","score":0.65563,"percentile":0.99263,"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."]}