CVE-2005-4558: IceWarp Web Mail 5.5.1, as used by Merak Mail Server 8.3.0r and VisNetic Mail Server version 8.3.0 build 1, do

This week

MEDIUM 6.5DOWNGRADEDOWNGRADEDOWNGRADE

CVE-2005-4558 is a medium-severity flaw (CVSS 6.5) affecting visnetic mail server, web mail, mail server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

IceWarp Web Mail 5.5.1, as used by Merak Mail Server 8.3.0r and VisNetic Mail Server version 8.3.0 build 1, does not properly restrict acceptable values for the language parameter to mail/settings.html before it is stored in a database, which can allow remote authenticated users to include arbitrary PHP code via a URL in a modified lang_settings parameter to mail/index.html.

Why this priority

EPSS top 5%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	6.5 (Medium)
EPSS exploit chance	8.5% (top 5%)
CISA exploited list	No
Published	2005-12-28
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: deerfield · icewarp · merak

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

Am I affected?

Timeline

2005-12-28 11:03 UTCPublished CVE record published
2026-06-16 22:19 UTCUpdated Record last modified

deerfield visnetic mail server DOWNGRADE

Affected: 8.3.0_build1

Fixed in: no fixed release known

Safe to downgrade to: a release before 8.3.0_build1

1. Check installed version

apt-cache policy visnetic-mail-server || rpm -q visnetic-mail-server || visnetic-mail-server --version

2. No fixed release: DOWNGRADE to a release before 8.3.0_build1 (Debian / Ubuntu)

apt-cache madison visnetic-mail-server sudo apt install visnetic-mail-server=<VERSION_BEFORE_8.3.0_build1> sudo apt-mark hold visnetic-mail-server

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

dnf --showduplicates list visnetic-mail-server sudo dnf downgrade visnetic-mail-server-<VERSION_BEFORE_8.3.0_build1> sudo dnf versionlock add visnetic-mail-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.

icewarp web mail DOWNGRADE

Affected: 5.5.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.5.1

1. Check installed version

apt-cache policy web-mail || rpm -q web-mail || web-mail --version

2. No fixed release: DOWNGRADE to a release before 5.5.1 (Debian / Ubuntu)

apt-cache madison web-mail sudo apt install web-mail=<VERSION_BEFORE_5.5.1> sudo apt-mark hold web-mail

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

dnf --showduplicates list web-mail sudo dnf downgrade web-mail-<VERSION_BEFORE_5.5.1> sudo dnf versionlock add web-mail

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.

merak mail server DOWNGRADE

Affected: 8.3.0r

Fixed in: no fixed release known

Safe to downgrade to: a release before 8.3.0r

1. Check installed version

apt-cache policy mail-server || rpm -q mail-server || mail-server --version

2. No fixed release: DOWNGRADE to a release before 8.3.0r (Debian / Ubuntu)

apt-cache madison mail-server sudo apt install mail-server=<VERSION_BEFORE_8.3.0r> sudo apt-mark hold mail-server

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

dnf --showduplicates list mail-server sudo dnf downgrade mail-server-<VERSION_BEFORE_8.3.0r> sudo dnf versionlock add mail-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: IceWarp Universal WebMail - '/mail/index.html?lang_settings' Remote File Inclusion
Exploit-DB: IceWarp Universal WebMail - '/mail/settings.html?Language' Local File Inclusion

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-2005-4558?

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

Is CVE-2005-4558 being exploited?

CVE-2005-4558 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-2005-4558 affect?

CVE-2005-4558 affects visnetic mail server, web mail, mail server. Severity is medium (CVSS 6.5). IceWarp Web Mail 5.5.1, as used by Merak Mail Server 8.3.0r and VisNetic Mail Server version 8.3.0 build 1, does not properly restrict acceptable values for the language parameter to mail/settings.html before it is stored in a database, whi

How urgent is CVE-2005-4558?

Priority 52/100. EPSS top 5%: very likely to be exploited; Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2006-0818 MEDIUM 4.0 DOWNGRADE DOWNGRADE Absolute path directory traversal vulnerability in (1) MERAK Mail Server for Windows 8.3.8r with before IceWar
CVE-2006-0817 MEDIUM 5.0 DOWNGRADE DOWNGRADE Absolute path directory traversal vulnerability in (a) MERAK Mail Server for Windows 8.3.8r with before IceWar
CVE-2005-4559 MEDIUM 5.0 DOWNGRADE DOWNGRADE mail/include.html in IceWarp Web Mail 5.5.1, as used by Merak Mail Server 8.3.0r and VisNetic Mail Server vers
CVE-2005-4557 MEDIUM 5.0 DOWNGRADE DOWNGRADE dir/include.html in IceWarp Web Mail 5.5.1, as used by Merak Mail Server 8.3.0r and VisNetic Mail Server versi
CVE-2005-4556 HIGH 7.5 DOWNGRADE DOWNGRADE PHP remote file include vulnerability in IceWarp Web Mail 5.5.1, as used by Merak Mail Server 8.3.0r and VisNe

References

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