CVE-2003-0276: Buffer overflow in Pi3Web 2.0.1 allows remote attackers to cause a denial of service (crash) and possibly exec

This week

MEDIUM 5.0DOWNGRADE

CVE-2003-0276 is a medium-severity flaw (CVSS 5.0) affecting pi3web. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in Pi3Web 2.0.1 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a GET request with a large number of / characters.

Why this priority

EPSS top 4%: 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	11.4% (top 4%)
CISA exploited list	No
Published	2003-06-16
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

2003-06-16 04:00 UTCPublished CVE record published
2026-06-16 22:01 UTCUpdated Record last modified

pi3 pi3web DOWNGRADE

Affected: 2.0.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.0.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.0.1 (Debian / Ubuntu)

apt-cache madison pi3web sudo apt install pi3web=<VERSION_BEFORE_2.0.1> sudo apt-mark hold pi3web

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

dnf --showduplicates list pi3web sudo dnf downgrade pi3web-<VERSION_BEFORE_2.0.1> 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: Pi3Web 2.0.1 - Denial of Service (PoC)
Exploit-DB: Pi3Web 2.0.1 - GET Denial of Service

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-2003-0276?

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

Is CVE-2003-0276 being exploited?

CVE-2003-0276 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-2003-0276 affect?

CVE-2003-0276 affects pi3web. Severity is medium (CVSS 5.0). Buffer overflow in Pi3Web 2.0.1 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a GET request with a large number of / characters.

How urgent is CVE-2003-0276?

Priority 46/100. EPSS top 4%: very likely to be exploited; Public exploit reference

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-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-2002-0142 HIGH 7.5 DOWNGRADE CGI handler in John Roy Pi3Web for Windows 2.0 beta 1 and 2 allows remote attackers to cause a denial of servi
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

← Back to latest CVEs