CVE-2006-4320: PHP remote file inclusion vulnerability in sef.php in the OpenSEF 2.0.0 component for Joomla! allows remote at

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HIGH 7.5DOWNGRADE

CVE-2006-4320 is a high-severity flaw (CVSS 7.5) affecting opensef. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

PHP remote file inclusion vulnerability in sef.php in the OpenSEF 2.0.0 component for Joomla! allows remote attackers to execute arbitrary PHP code via a URL in the mosConfig_absolute_path parameter.

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	1.5% (top 26%)
CISA exploited list	No
Published	2006-08-24
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: opensef project

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

Am I affected?

Timeline

2006-08-24 01:04 UTCPublished CVE record published
2026-06-16 22:28 UTCUpdated Record last modified

opensef project opensef DOWNGRADE

Affected: 2.0-beta3 · 2.0_rc1 · 2.0_rc2 · 2.0_rc3 · 2.0_rc4 · 2.0_rc5 · 2.0_rc5_sp1 · 2.0_rc5_sp2

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.0-beta3

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.0-beta3 (Debian / Ubuntu)

apt-cache madison opensef sudo apt install opensef=<VERSION_BEFORE_2.0-beta3> sudo apt-mark hold opensef

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

dnf --showduplicates list opensef sudo dnf downgrade opensef-<VERSION_BEFORE_2.0-beta3> sudo dnf versionlock add opensef

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-2006-4320?

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

Is CVE-2006-4320 being exploited?

CVE-2006-4320 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-2006-4320 affect?

CVE-2006-4320 affects opensef. Severity is high (CVSS 7.5). PHP remote file inclusion vulnerability in sef.php in the OpenSEF 2.0.0 component for Joomla! allows remote attackers to execute arbitrary PHP code via a URL in the mosConfig_absolute_path parameter.

How urgent is CVE-2006-4320?

Priority 45/100. High severity

Software pages

Joomla vulnerabilities · PHP vulnerabilities

References

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