CVE-2002-1031: KeyFocus (KF) web server 1.0.2 allows remote attackers to list directories and read restricted files via an HT

This month

MEDIUM 5.0DOWNGRADE

CVE-2002-1031 is a medium-severity flaw (CVSS 5.0) affecting kf web server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

KeyFocus (KF) web server 1.0.2 allows remote attackers to list directories and read restricted files via an HTTP request containing a %00 (null) character.

Why this priority

EPSS top 5%: very likely to be exploited
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	8.0% (top 5%)
CISA exploited list	No
Published	2002-10-04
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: key focus

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2002-10-04 04:00 UTCPublished CVE record published
2026-06-16 21:58 UTCUpdated Record last modified

key focus kf web server DOWNGRADE

Affected: 1.0.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.2

1. Check installed version

apt-cache policy kf-web-server || rpm -q kf-web-server || kf-web-server --version

2. No fixed release: DOWNGRADE to a release before 1.0.2 (Debian / Ubuntu)

apt-cache madison kf-web-server sudo apt install kf-web-server=<VERSION_BEFORE_1.0.2> sudo apt-mark hold kf-web-server

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list kf-web-server sudo dnf downgrade kf-web-server-<VERSION_BEFORE_1.0.2> sudo dnf versionlock add kf-web-server

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Key Focus KF Web Server 1.0.2 - Directory Contents Disclosure

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2002-1031?

kf web server: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2002-1031 being exploited?

CVE-2002-1031 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2002-1031 affect?

CVE-2002-1031 affects kf web server. Severity is medium (CVSS 5.0). KeyFocus (KF) web server 1.0.2 allows remote attackers to list directories and read restricted files via an HTTP request containing a %00 (null) character.

How urgent is CVE-2002-1031?

Priority 46/100. EPSS top 5%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2007-3396 MEDIUM 4.3 DOWNGRADE Cross-site scripting (XSS) vulnerability in index.wkf in KeyFocus (KF) web server 3.1.0 allows remote attacker
CVE-2002-2403 MEDIUM 5.0 DOWNGRADE Directory traversal vulnerability in KeyFocus web server 1.0.8 allows remote attackers to read arbitrary files
CVE-2002-1032 HIGH 7.5 UPGRADE Buffer overflow in KeyFocus (KF) web server 1.0.5 and earlier allows remote attackers to cause a denial of ser

References

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