CVE-2003-0459: KDE Konqueror for KDE 3.1.2 and earlier does not remove authentication credentials from URLs of the "user:pass

This month

MEDIUM 5.0WATCHLISTDOWNGRADEDOWNGRADEDOWNGRADE

CVE-2003-0459 is a medium-severity flaw (CVSS 5.0) affecting konqueror, konqueror embedded, analog real-time synthesizer. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

KDE Konqueror for KDE 3.1.2 and earlier does not remove authentication credentials from URLs of the "user:password@host" form in the HTTP-Referer header, which could allow remote web sites to steal the credentials for pages that link to the sites.

Why this priority

On your watchlist

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
Published	2003-08-27
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: kde · redhat

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

Am I affected?

Timeline

2003-08-27 04:00 UTCPublished CVE record published
2026-06-16 22:02 UTCUpdated Record last modified

kde konqueror DOWNGRADE

Affected: 2.1.1 · 2.2.2 · 3.0 · 3.0.1 · 3.0.2 · 3.0.3 · 3.0.5 · 3.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.1.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.1.1 (Debian / Ubuntu)

apt-cache madison konqueror sudo apt install konqueror=<VERSION_BEFORE_2.1.1> sudo apt-mark hold konqueror

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

dnf --showduplicates list konqueror sudo dnf downgrade konqueror-<VERSION_BEFORE_2.1.1> sudo dnf versionlock add konqueror

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.

kde konqueror embedded DOWNGRADE

Affected: 0.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.1

1. Check installed version

apt-cache policy konqueror-embedded || rpm -q konqueror-embedded || konqueror-embedded --version

2. No fixed release: DOWNGRADE to a release before 0.1 (Debian / Ubuntu)

apt-cache madison konqueror-embedded sudo apt install konqueror-embedded=<VERSION_BEFORE_0.1> sudo apt-mark hold konqueror-embedded

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

dnf --showduplicates list konqueror-embedded sudo dnf downgrade konqueror-embedded-<VERSION_BEFORE_0.1> sudo dnf versionlock add konqueror-embedded

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.

redhat analog real-time synthesizer DOWNGRADE

Affected: 2.1.1-5 · 2.2-11

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.1.1-5

1. Check installed version

apt-cache policy analog-real-time-synthesizer || rpm -q analog-real-time-synthesizer || analog-real-time-synthesizer --version

2. No fixed release: DOWNGRADE to a release before 2.1.1-5 (Debian / Ubuntu)

apt-cache madison analog-real-time-synthesizer sudo apt install analog-real-time-synthesizer=<VERSION_BEFORE_2.1.1-5> sudo apt-mark hold analog-real-time-synthesizer

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

dnf --showduplicates list analog-real-time-synthesizer sudo dnf downgrade analog-real-time-synthesizer-<VERSION_BEFORE_2.1.1-5> sudo dnf versionlock add analog-real-time-synthesizer

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.

redhat kdebase DOWNGRADE

Affected: 3.0.3-13

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.0.3-13

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 3.0.3-13 (Debian / Ubuntu)

apt-cache madison kdebase sudo apt install kdebase=<VERSION_BEFORE_3.0.3-13> sudo apt-mark hold kdebase

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

dnf --showduplicates list kdebase sudo dnf downgrade kdebase-<VERSION_BEFORE_3.0.3-13> sudo dnf versionlock add kdebase

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.

redhat kdelibs DOWNGRADE

Affected: 2.1.1-5 · 2.2-11 · 3.0.0-10 · 3.1-10

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.1.1-5

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.1.1-5 (Debian / Ubuntu)

apt-cache madison kdelibs sudo apt install kdelibs=<VERSION_BEFORE_2.1.1-5> sudo apt-mark hold kdelibs

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

dnf --showduplicates list kdelibs sudo dnf downgrade kdelibs-<VERSION_BEFORE_2.1.1-5> sudo dnf versionlock add kdelibs

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.

redhat kdelibs devel DOWNGRADE

Affected: 2.1.1-5 · 2.2-11 · 3.0.0-10 · 3.0.3-8 · 3.1-10

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.1.1-5

1. Check installed version

apt-cache policy kdelibs-devel || rpm -q kdelibs-devel || kdelibs-devel --version

2. No fixed release: DOWNGRADE to a release before 2.1.1-5 (Debian / Ubuntu)

apt-cache madison kdelibs-devel sudo apt install kdelibs-devel=<VERSION_BEFORE_2.1.1-5> sudo apt-mark hold kdelibs-devel

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

dnf --showduplicates list kdelibs-devel sudo dnf downgrade kdelibs-devel-<VERSION_BEFORE_2.1.1-5> sudo dnf versionlock add kdelibs-devel

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-2003-0459?

konqueror: downgrade or apply the listed mitigation; konqueror embedded: downgrade or apply the listed mitigation; analog real-time synthesizer: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2003-0459 being exploited?

CVE-2003-0459 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-2003-0459 affect?

CVE-2003-0459 affects konqueror, konqueror embedded, analog real-time synthesizer. Severity is medium (CVSS 5.0). KDE Konqueror for KDE 3.1.2 and earlier does not remove authentication credentials from URLs of the "user:password@host" form in the HTTP-Referer header, which could allow remote web sites to steal the credentials for pages that link to the

How urgent is CVE-2003-0459?

Priority 44/100. On your watchlist

Related CVEs

CVE-2009-2537 MEDIUM 4.3 MITIGATE KDE Konqueror allows remote attackers to cause a denial of service (memory consumption) via a large integer va
CVE-2008-5712 MEDIUM 5.0 DOWNGRADE The HTML parser in KDE Konqueror 3.5.9 allows remote attackers to cause a denial of service (application crash
CVE-2008-5698 MEDIUM 4.3 MITIGATE HTMLTokenizer::scriptHandler in Konqueror in KDE 3.5.9 and 3.5.10 allows remote attackers to cause a denial of
CVE-2008-4514 MEDIUM 5.0 DOWNGRADE The HTML parser in KDE Konqueror 3.5.9 allows remote attackers to cause a denial of service (application crash
CVE-2008-4382 MEDIUM 5.0 DOWNGRADE Konqueror in KDE 3.5.9 allows remote attackers to cause a denial of service (application crash) via Javascript

References

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