CVE-2002-1599: DansGuardian before 2.4.5-1 allows remote attackers to bypass content filtering rules via hex-encoded URLs.

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HIGH 7.5DOWNGRADE

CVE-2002-1599 is a high-severity flaw (CVSS 7.5) affecting dansguardian. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

DansGuardian before 2.4.5-1 allows remote attackers to bypass content filtering rules via hex-encoded URLs.

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	1.9% (top 20%)
CISA exploited list	No
Published	2002-07-23
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: daniel barron

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

Am I affected?

Timeline

2002-07-23 04:00 UTCPublished CVE record published
2026-06-16 21:59 UTCUpdated Record last modified

daniel barron dansguardian DOWNGRADE

Affected: 2.2.2.7.1 · 2.2.2.9.1 · 2_2.2.4 · 2_2.2.5 · 2_2.2.6 · 2_2.2.7 · 2_2.2.8 · 2_2.2.9

Fixed in: no fixed release known

Safe to downgrade to: a release before 2_2.2.4

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2_2.2.4 (Debian / Ubuntu)

apt-cache madison dansguardian sudo apt install dansguardian=<VERSION_BEFORE_2_2.2.4> sudo apt-mark hold dansguardian

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

dnf --showduplicates list dansguardian sudo dnf downgrade dansguardian-<VERSION_BEFORE_2_2.2.4> sudo dnf versionlock add dansguardian

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-2002-1599?

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

Is CVE-2002-1599 being exploited?

CVE-2002-1599 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-2002-1599 affect?

CVE-2002-1599 affects dansguardian. Severity is high (CVSS 7.5). DansGuardian before 2.4.5-1 allows remote attackers to bypass content filtering rules via hex-encoded URLs.

How urgent is CVE-2002-1599?

Priority 46/100. High severity

Related CVEs

CVE-2004-2283 MEDIUM 5.0 DOWNGRADE Unknown vulnerability in DansGuardian before 2.6.1-13 allows remote attackers to bypass URL filters via a craf
CVE-2004-2282 MEDIUM 5.0 DOWNGRADE DansGuardian before 2.7.7-2 allows remote attackers to bypass URL filters via a ".." in the request.
CVE-2004-2065 HIGH 7.5 DOWNGRADE DansGuardian 2.8 and earlier allows remote attackers to bypass the extension filtering rule via a hex encoded
CVE-2003-1506 MEDIUM 4.3 DOWNGRADE Cross-site scripting (XSS) vulnerability in dansguardian.pl in Adelix CensorNet 3.0 through 3.2 allows remote

References

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