CVE-2003-0391: Format string vulnerability in Magic WinMail Server 2.3, and possibly other 2.x versions, allows remote attack

Q: How do I fix CVE-2003-0391?

magic winmail server: upgrade to newer than 2.3. Exact commands for each OS are on this page.

Q: Is CVE-2003-0391 being exploited?

CVE-2003-0391 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-2003-0391 affect?

CVE-2003-0391 affects magic winmail server. Severity is high (CVSS 7.5). Format string vulnerability in Magic WinMail Server 2.3, and possibly other 2.x versions, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via format string specifiers in the PASS command.

Q: How urgent is CVE-2003-0391?

Priority 54/100. High severity; Public exploit reference

This month

HIGH 7.5UPGRADE

CVE-2003-0391 is a high-severity flaw (CVSS 7.5) affecting magic winmail server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Format string vulnerability in Magic WinMail Server 2.3, and possibly other 2.x versions, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via format string specifiers in the PASS command.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	3.5% (top 11%)
CISA exploited list	No
Published	2003-07-02
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: amax information technologies

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

Am I affected?

Timeline

2003-07-02 04:00 UTCPublished CVE record published
2026-06-16 22:02 UTCUpdated Record last modified

amax information technologies magic winmail server UPGRADE

Affected: <= 2.3

Fixed in: newer than 2.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy magic-winmail-server || rpm -q magic-winmail-server || magic-winmail-server --version

2. UPGRADE to newer than 2.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade magic-winmail-server

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade magic-winmail-server

Note

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

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: Winmail Mail Server 2.3 Build 0402 - Remote Format String

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-2003-0391?

magic winmail server: upgrade to newer than 2.3. Exact commands for each OS are on this page.

Is CVE-2003-0391 being exploited?

CVE-2003-0391 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-2003-0391 affect?

CVE-2003-0391 affects magic winmail server. Severity is high (CVSS 7.5). Format string vulnerability in Magic WinMail Server 2.3, and possibly other 2.x versions, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via format string specifiers in the PASS command.

How urgent is CVE-2003-0391?

Priority 54/100. High severity; Public exploit reference

Related CVEs

CVE-2005-3811 MEDIUM 5.0 UPGRADE Directory traversal vulnerability in admin/main.php in AMAX Magic Winmail Server 4.2 (build 0824) and earlier
CVE-2005-3692 MEDIUM 4.3 DOWNGRADE Cross-site scripting (XSS) vulnerability in AMAX Magic Winmail Server 4.2 (build 0824) and earlier allows remo
CVE-2005-0315 MEDIUM 4.6 DOWNGRADE The FTP service in Magic Winmail Server 4.0 Build 1112 does not verify that the IP address in a PORT command i
CVE-2005-0313 HIGH 7.5 DOWNGRADE Multiple directory traversal vulnerabilities in Magic Winmail Server 4.0 Build 1112 allow remote attackers to
CVE-2004-2572 MEDIUM 5.0 DOWNGRADE AMAX Magic Winmail Server 3.6 allows remote attackers to obtain sensitive information by entering (1) invalid

References

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