CVE-2004-1103: MailPost 5.1.1sv, and possibly earlier versions, when debug mode is enabled, allows remote attackers to gain s

Routine

MEDIUM 5.0DOWNGRADE

CVE-2004-1103 is a medium-severity flaw (CVSS 5.0) affecting mailpost. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

MailPost 5.1.1sv, and possibly earlier versions, when debug mode is enabled, allows remote attackers to gain sensitive information via the debug parameter, which reveals information such as the path to the web root and the web server version.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	2.8% (top 14%)
CISA exploited list	No
Published	2005-01-10
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: tips

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

Am I affected?

Timeline

2005-01-10 05:00 UTCPublished CVE record published
2026-06-16 22:07 UTCUpdated Record last modified

tips mailpost DOWNGRADE

Affected: 5.1.1_sv

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.1.1_sv

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 5.1.1_sv (Debian / Ubuntu)

apt-cache madison mailpost sudo apt install mailpost=<VERSION_BEFORE_5.1.1_sv> sudo apt-mark hold mailpost

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

dnf --showduplicates list mailpost sudo dnf downgrade mailpost-<VERSION_BEFORE_5.1.1_sv> sudo dnf versionlock add mailpost

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-2004-1103?

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

Is CVE-2004-1103 being exploited?

CVE-2004-1103 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-2004-1103 affect?

CVE-2004-1103 affects mailpost. Severity is medium (CVSS 5.0). MailPost 5.1.1sv, and possibly earlier versions, when debug mode is enabled, allows remote attackers to gain sensitive information via the debug parameter, which reveals information such as the path to the web root and the web server versio

How urgent is CVE-2004-1103?

Priority 39/100. No elevated risk signals yet.

Related CVEs

CVE-2004-1102 MEDIUM 5.0 DOWNGRADE MailPost 5.1.1sv, and possibly earlier versions, displays a different error message depending on whether the r
CVE-2004-1101 MEDIUM 5.8 DOWNGRADE mailpost.exe in MailPost 5.1.1sv, and possibly earlier versions, allows remote attackers to cause a denial of
CVE-2004-1100 MEDIUM 6.8 DOWNGRADE Cross-site scripting (XSS) vulnerability in mailpost.exe in MailPost 5.1.1sv, and possibly earlier versions, w

References

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