---
title: "CVE-2001-1013: Apache on Red Hat Linux… | CubePath"
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…"
language: en
source: https://cubepath.com/security/cve/CVE-2001-1013
---

# CVE-2001-1013: Apache on Red Hat Linux… | CubePath

## 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.

Official description from the CVE record, published by mitre. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2001-1013)

## Key data

### EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score

0.65563 (65.6% probability)

Percentile

99.3%

Scores of

Nov 10, 2026

Model

v2026.06.15

## References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

- [3335](http://www.securityfocus.com/bid/3335)  (securityfocus.com) vdb-entry
- [20010912 Is there user Anna at your host ?](http://www.securityfocus.com/archive/1/213667)  (securityfocus.com) mailing-list
- [20000707 Re: your mail](http://archives.neohapsis.com/archives/vuln-dev/2000-q3/0094.html)  (archives.neohapsis.com) mailing-list
- [20000707 (no subject)](http://archives.neohapsis.com/archives/vuln-dev/2000-q3/0083.html)  (archives.neohapsis.com) mailing-list
- [linux-apache-username-exists(7129)](https://exchange.xforce.ibmcloud.com/vulnerabilities/7129)  (exchange.xforce.ibmcloud.com) vdb-entry
- [20000707 Re: apache and 404/404 status codes](http://archives.neohapsis.com/archives/vuln-dev/2000-q3/0087.html)  (archives.neohapsis.com) mailing-list

## Timeline

1. ID reserved Jan 31, 2002
2. Record published Feb 2, 2002
3. Record last updated Aug 8, 2024

## Look up another CVE

## About CubePath

CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection.

[Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection)

Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:57 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)