CVE-2004-1801: Directory traversal vulnerability in PWebServer 0.3.3 allows remote attackers to read arbitrary files via a .

This month

MEDIUM 5.0DOWNGRADE

CVE-2004-1801 is a medium-severity flaw (CVSS 5.0) affecting pwebserver web server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Directory traversal vulnerability in PWebServer 0.3.3 allows remote attackers to read arbitrary files via a .. (dot dot) in the URL.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	3.1% (top 12%)
CISA exploited list	No
Published	2004-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: pwebserver

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

Am I affected?

Timeline

2004-12-31 05:00 UTCPublished CVE record published
2026-06-16 22:08 UTCUpdated Record last modified

pwebserver pwebserver web server DOWNGRADE

Affected: 0.3.0 · 0.3.2 · 0.3.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.3.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.3.0 (Debian / Ubuntu)

apt-cache madison pwebserver-web-server sudo apt install pwebserver-web-server=<VERSION_BEFORE_0.3.0> sudo apt-mark hold pwebserver-web-server

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

dnf --showduplicates list pwebserver-web-server sudo dnf downgrade pwebserver-web-server-<VERSION_BEFORE_0.3.0> sudo dnf versionlock add pwebserver-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: PWebServer 0.3.x - Directory Traversal

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-2004-1801?

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

Is CVE-2004-1801 being exploited?

CVE-2004-1801 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-2004-1801 affect?

CVE-2004-1801 affects pwebserver web server. Severity is medium (CVSS 5.0). Directory traversal vulnerability in PWebServer 0.3.3 allows remote attackers to read arbitrary files via a .. (dot dot) in the URL.

How urgent is CVE-2004-1801?

Priority 44/100. Public exploit reference

References

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