CVE-2004-1990: Aldo's Web Server (aweb) 1.5 allows remote attackers to gain sensitive information via an arbitrary character,

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MEDIUM 5.0DOWNGRADE

CVE-2004-1990 is a medium-severity flaw (CVSS 5.0) affecting aldos web server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Aldo's Web Server (aweb) 1.5 allows remote attackers to gain sensitive information via an arbitrary character, which reveals the full path and the user running the aweb process, possibly due to a malformed 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	2.5% (top 15%)
CISA exploited list	No
Published	2004-03-03
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: aldo vargas

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

Am I affected?

Timeline

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

aldo vargas aldos 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-2004-1990?

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

Is CVE-2004-1990 being exploited?

CVE-2004-1990 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-2004-1990 affect?

CVE-2004-1990 affects aldos web server. Severity is medium (CVSS 5.0). Aldo's Web Server (aweb) 1.5 allows remote attackers to gain sensitive information via an arbitrary character, which reveals the full path and the user running the aweb process, possibly due to a malformed request.

How urgent is CVE-2004-1990?

Priority 44/100. Public exploit reference

References

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