{"id":"CVE-2001-1013","url":"https://www.cyber-defence.io/tools/cve/CVE-2001-1013","generatedAt":"2026-10-27T17:29:50.871Z","title":"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…","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.","published":"2001-09-12T04:00:00.000Z","lastModified":"2026-06-16T21:55:25.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"2.0","score":5,"severity":"MEDIUM","vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N"},"cwe":[],"affected":["redhat/linux"],"epss":{"score":0.65563,"percentile":0.99258,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":1,"verified":true,"firstPublished":"2001-09-12","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":21112,"kind":"exploit","title":"RedHat Linux 7.0 Apache - Remote Username Enumeration","url":"https://www.exploit-db.com/exploits/21112","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/linux/remote/21112.php","file":"exploits/linux/remote/21112.php","published":"2001-09-12","added":"2001-09-12","updated":"2012-09-06","author":"Gabriel A Maggiotti","type":"remote","platform":"linux","port":null,"verified":true,"codes":["CVE-2001-1013","OSVDB-637"],"tags":null,"aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":"https://www.securityfocus.com/bid/3335/info"}]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 65.6%, higher than 99% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://archives.neohapsis.com/archives/vuln-dev/2000-q3/0083.html","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://archives.neohapsis.com/archives/vuln-dev/2000-q3/0087.html","source":"cve@mitre.org"},{"url":"http://archives.neohapsis.com/archives/vuln-dev/2000-q3/0094.html","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/archive/1/213667","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/bid/3335","tags":["Exploit","Patch","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/7129","source":"cve@mitre.org"},{"url":"http://archives.neohapsis.com/archives/vuln-dev/2000-q3/0083.html","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://archives.neohapsis.com/archives/vuln-dev/2000-q3/0087.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://archives.neohapsis.com/archives/vuln-dev/2000-q3/0094.html","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/archive/1/213667","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/3335","tags":["Exploit","Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/7129","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2001-1013","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}