CVE-2004-0721: Konqueror 3.1.3, 3.2.2, and possibly other versions does not properly prevent a frame in one domain from injec

This month

HIGH 7.5DOWNGRADE

CVE-2004-0721 is a high-severity flaw (CVSS 7.5) affecting konqueror. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Konqueror 3.1.3, 3.2.2, and possibly other versions does not properly prevent a frame in one domain from injecting content into a frame that belongs to another domain, which facilitates web site spoofing and other attacks, aka the frame injection vulnerability.

Why this priority

High severity

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	1.6% (top 24%)
CISA exploited list	No
Published	2004-07-27
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: kde

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

Am I affected?

Timeline

2004-07-27 04:00 UTCPublished CVE record published
2026-06-16 22:06 UTCUpdated Record last modified

kde konqueror DOWNGRADE

Affected: 3.1.3 · 3.2.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.1.3

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 3.1.3 (Debian / Ubuntu)

apt-cache madison konqueror sudo apt install konqueror=<VERSION_BEFORE_3.1.3> sudo apt-mark hold konqueror

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

dnf --showduplicates list konqueror sudo dnf downgrade konqueror-<VERSION_BEFORE_3.1.3> 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.

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-2004-0721?

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

Is CVE-2004-0721 being exploited?

CVE-2004-0721 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-2004-0721 affect?

CVE-2004-0721 affects konqueror. Severity is high (CVSS 7.5). Konqueror 3.1.3, 3.2.2, and possibly other versions does not properly prevent a frame in one domain from injecting content into a frame that belongs to another domain, which facilitates web site spoofing and other attacks, aka the frame inj

How urgent is CVE-2004-0721?

Priority 45/100. High severity

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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