CVE-2004-0042

vsftpd 1.1.3 generates different error messages depending on whether or not a valid username exists, which allows remote attackers to identify valid usernames.

Published: 2004-02-03 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2004-0042 is rated Moderate Risk (42.9/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.50%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2004-0042

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-09-18 0.35% 0.50% +0.15%
2 2025-03-30 0.39% 0.35% -0.04%
3 2025-03-29 — 0.39% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2004-0042

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2004-0042

OS Trackers for CVE-2004-0042

vendor priority summary link
debian not yet assigned CVE-2004-0042 not yet assigned priority: Debian including 1 source packages (vsftpd), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2004-0042

Affected software / configurations for CVE-2004-0042

Vendor Product Version Raw CPE
beasts vsftpd 1.1.3 cpe:2.3:a:beasts:vsftpd:1.1.3:*:*:*:*:*:*:*

References for CVE-2004-0042

cvelogic Threat Intelligence