CVE-2002-0142: CGI handler in John Roy Pi3Web for Windows 2.0 beta 1 and 2 allows remote attackers to cause a denial of servi

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HIGH 7.5DOWNGRADE

CVE-2002-0142 is a high-severity flaw (CVSS 7.5) affecting pi3web. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

CGI handler in John Roy Pi3Web for Windows 2.0 beta 1 and 2 allows remote attackers to cause a denial of service (crash) via a series of requests whose physical path is exactly 260 characters long and ends in a series of . (dot) characters.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	3.1% (top 12%)
CISA exploited list	No
Published	2002-03-25
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: pi3

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

Am I affected?

Timeline

2002-03-25 05:00 UTCPublished CVE record published
2026-06-16 21:56 UTCUpdated Record last modified

pi3 pi3web DOWNGRADE

Affected: 2.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.0

1. Check installed version

apt-cache policy pi3web || rpm -q pi3web || pi3web --version

2. No fixed release: DOWNGRADE to a release before 2.0 (Debian / Ubuntu)

apt-cache madison pi3web sudo apt install pi3web=<VERSION_BEFORE_2.0> sudo apt-mark hold pi3web

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

dnf --showduplicates list pi3web sudo dnf downgrade pi3web-<VERSION_BEFORE_2.0> sudo dnf versionlock add pi3web

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: John Roy Pi3Web 2.0 For Windows - Remote Buffer Overflow

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-2002-0142?

pi3web: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2002-0142 being exploited?

CVE-2002-0142 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-2002-0142 affect?

CVE-2002-0142 affects pi3web. Severity is high (CVSS 7.5). CGI handler in John Roy Pi3Web for Windows 2.0 beta 1 and 2 allows remote attackers to cause a denial of service (crash) via a series of requests whose physical path is exactly 260 characters long and ends in a series of . (dot) characters.

How urgent is CVE-2002-0142?

Priority 53/100. High severity; Public exploit reference

Software pages

Windows vulnerabilities

Related CVEs

CVE-2008-6938 MEDIUM 4.3 UPGRADE Pi3Web 2.0.3 before PL2, when installed on Windows as a desktop application and without using the Pi3Web/Conf/
CVE-2003-1032 MEDIUM 5.0 DOWNGRADE Pi3Web web server 2.0.2 Beta 1, when the Directory Index is configured to use the "Name" column and sort using
CVE-2003-0276 MEDIUM 5.0 DOWNGRADE Buffer overflow in Pi3Web 2.0.1 allows remote attackers to cause a denial of service (crash) and possibly exec
CVE-2002-0433 MEDIUM 5.0 DOWNGRADE Pi3Web 2.0.0 allows remote attackers to view restricted files via an HTTP request containing a "*" (wildcard o
CVE-2001-0303 MEDIUM 5.0 DOWNGRADE tstisapi.dll in Pi3Web 1.0.1 web server allows remote attackers to determine the physical path of the server v

References

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