CVE-2001-0180: Lars Ellingsen guestserver.cgi allows remote attackers to execute arbitrary commands via shell metacharacters

Q: How do I fix CVE-2001-0180?

guestserver: upgrade to newer than 4.12. Exact commands for each OS are on this page.

Q: Is CVE-2001-0180 being exploited?

CVE-2001-0180 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2001-0180 affect?

CVE-2001-0180 affects guestserver. Severity is high (CVSS 10.0). Lars Ellingsen guestserver.cgi allows remote attackers to execute arbitrary commands via shell metacharacters in the "email" parameter.

Q: How urgent is CVE-2001-0180?

Priority 63/100. Critical severity; EPSS top 8%: very likely to be exploited; Public exploit reference

This week

HIGH 10.0UPGRADE

CVE-2001-0180 is a high-severity flaw (CVSS 10.0) affecting guestserver. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Lars Ellingsen guestserver.cgi allows remote attackers to execute arbitrary commands via shell metacharacters in the "email" parameter.

Why this priority

Critical severity
EPSS top 8%: very likely to be exploited
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	10.0 (High)
EPSS exploit chance	4.7% (top 8%)
CISA exploited list	No
Published	2001-05-03
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: lars ellingsen

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

Am I affected?

Timeline

2001-05-03 04:00 UTCPublished CVE record published
2026-06-16 21:53 UTCUpdated Record last modified

lars ellingsen guestserver UPGRADE

Affected: <= 4.12

Fixed in: newer than 4.12

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 4.12 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade guestserver

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade guestserver

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2001-0180?

guestserver: upgrade to newer than 4.12. Exact commands for each OS are on this page.

Is CVE-2001-0180 being exploited?

CVE-2001-0180 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-2001-0180 affect?

CVE-2001-0180 affects guestserver. Severity is high (CVSS 10.0). Lars Ellingsen guestserver.cgi allows remote attackers to execute arbitrary commands via shell metacharacters in the "email" parameter.

How urgent is CVE-2001-0180?

Priority 63/100. Critical severity; EPSS top 8%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2005-4222 MEDIUM 4.3 DOWNGRADE Multiple cross-site scripting (XSS) vulnerabilities in guestbook.cgi in Lars Ellingsen Guestserver 4.13 and ea

References

← Back to latest CVEs