SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2001-1013

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…

EXPLOIT ✓MEDIUM 5.0EPSS 65.6%

Does this matter?

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.

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 2.0
5.0 MEDIUMAV:N/AC:L/Au:N/C:P/I:N/A:N
EPSS
65.56% probability · 99th percentile
Public exploits
1 in Exploit-DB · verified · first 12 September 2001
CISA KEV
Not listed
Affected
redhat/linux
Source
cve@mitre.org
EPSS trend
0%35%70%26 October 2026: 65.56%26 October 202626 October 2026

EPSS 65.6% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

Public exploits (1)

Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.

EDB-IDTitleTypePublishedVerified
EDB-21112source ↗RedHat Linux 7.0 Apache - Remote Username Enumerationlinux · Gabriel A Maggiottiremote12 September 2001yes

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.