CVE-2006-5251: PHP remote file inclusion vulnerability in index.php in Deep CMS 2.0a allows remote attackers to execute arbit

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HIGH 7.5DOWNGRADE

CVE-2006-5251 is a high-severity flaw (CVSS 7.5) affecting deep cms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

PHP remote file inclusion vulnerability in index.php in Deep CMS 2.0a allows remote attackers to execute arbitrary PHP code via a URL in the ConfigDir parameter. NOTE: the provenance of this information is unknown; the details are obtained from third party information.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	2.2% (top 18%)
CISA exploited list	No
Published	2006-10-12
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: deep cms

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

Am I affected?

Timeline

2006-10-12 22:07 UTCPublished CVE record published
2026-06-16 22:30 UTCUpdated Record last modified

deep cms deep cms DOWNGRADE

Affected: 2.0a

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.0a

1. Check installed version

apt-cache policy deep-cms || rpm -q deep-cms || deep-cms --version

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

apt-cache madison deep-cms sudo apt install deep-cms=<VERSION_BEFORE_2.0a> sudo apt-mark hold deep-cms

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

dnf --showduplicates list deep-cms sudo dnf downgrade deep-cms-<VERSION_BEFORE_2.0a> sudo dnf versionlock add deep-cms

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: Deep CMS 2.0 - 'index.php' Remote 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-2006-5251?

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

Is CVE-2006-5251 being exploited?

CVE-2006-5251 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-2006-5251 affect?

CVE-2006-5251 affects deep cms. Severity is high (CVSS 7.5). PHP remote file inclusion vulnerability in index.php in Deep CMS 2.0a allows remote attackers to execute arbitrary PHP code via a URL in the ConfigDir parameter. NOTE: the provenance of this information is unknown; the details are obtained

How urgent is CVE-2006-5251?

Priority 52/100. High severity; Public exploit reference

Software pages

PHP vulnerabilities

References

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