CVE-2006-6552: PHP remote file inclusion vulnerability in admin/plugins/NP_UserSharing.php in BLOG:CMS 4.1.3 and earlier allo

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HIGH 7.5DOWNGRADE

CVE-2006-6552 is a high-severity flaw (CVSS 7.5) affecting blog 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 admin/plugins/NP_UserSharing.php in BLOG:CMS 4.1.3 and earlier allows remote attackers to execute arbitrary PHP code via a URL in the DIR_ADMIN parameter.

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	3.4% (top 11%)
CISA exploited list	No
Published	2006-12-14
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: php

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

Am I affected?

Timeline

2006-12-14 18:28 UTCPublished CVE record published
2026-06-16 22:33 UTCUpdated Record last modified

php blog cms DOWNGRADE

Affected: 4.1.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.1.3

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 4.1.3 (Debian / Ubuntu)

apt-cache madison blog-cms sudo apt install blog-cms=<VERSION_BEFORE_4.1.3> sudo apt-mark hold blog-cms

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

dnf --showduplicates list blog-cms sudo dnf downgrade blog-cms-<VERSION_BEFORE_4.1.3> sudo dnf versionlock add blog-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: Blog:CMS 4.1.3 - 'NP_UserSharing.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-2006-6552?

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

Is CVE-2006-6552 being exploited?

CVE-2006-6552 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-2006-6552 affect?

CVE-2006-6552 affects blog cms. Severity is high (CVSS 7.5). PHP remote file inclusion vulnerability in admin/plugins/NP_UserSharing.php in BLOG:CMS 4.1.3 and earlier allows remote attackers to execute arbitrary PHP code via a URL in the DIR_ADMIN parameter.

How urgent is CVE-2006-6552?

Priority 53/100. High severity; Public exploit reference

Software pages

PHP vulnerabilities

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References

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