CVE-2004-1991: Directory traversal vulnerability in Aldo's Web Server (aweb) 1.5 allows remote attackers to view arbitrary fi

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MEDIUM 5.0DOWNGRADE

CVE-2004-1991 is a medium-severity flaw (CVSS 5.0) affecting aldo\'s web server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Directory traversal vulnerability in Aldo's Web Server (aweb) 1.5 allows remote attackers to view arbitrary files via a .. (dot dot) in an HTTP GET request.

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	2.9% (top 13%)
CISA exploited list	No
Weakness	CWE-22
Published	2004-05-03
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: aldostools

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

Am I affected?

Timeline

2004-05-03 04:00 UTCPublished CVE record published
2026-06-16 22:08 UTCUpdated Record last modified

aldostools aldo\'s web server DOWNGRADE

Affected: 1.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.5

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.5 (Debian / Ubuntu)

apt-cache madison aldos-web-server sudo apt install aldos-web-server=<VERSION_BEFORE_1.5> sudo apt-mark hold aldos-web-server

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

dnf --showduplicates list aldos-web-server sudo dnf downgrade aldos-web-server-<VERSION_BEFORE_1.5> sudo dnf versionlock add aldos-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.

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-2004-1991?

aldo\'s web server: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2004-1991 being exploited?

CVE-2004-1991 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-2004-1991 affect?

CVE-2004-1991 affects aldo\'s web server. Severity is medium (CVSS 5.0). Directory traversal vulnerability in Aldo's Web Server (aweb) 1.5 allows remote attackers to view arbitrary files via a .. (dot dot) in an HTTP GET request.

How urgent is CVE-2004-1991?

Priority 44/100. Public exploit reference

References

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