CVE-2006-5223: PHP remote file inclusion vulnerability in includes/functions_user_viewed_posts.php in the Nivisec User Viewed

This month

HIGH 7.5DOWNGRADE

CVE-2006-5223 is a high-severity flaw (CVSS 7.5) affecting user viewed posts tracker. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

PHP remote file inclusion vulnerability in includes/functions_user_viewed_posts.php in the Nivisec User Viewed Posts Tracker module 1.0 and earlier for phpBB allows remote attackers to execute arbitrary PHP code via a URL in the phpbb_root_path parameter.

Why this priority

High severity
EPSS top 9%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	4.1% (top 9%)
CISA exploited list	No
Published	2006-10-10
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: nivisec

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

Am I affected?

Timeline

2006-10-10 21:07 UTCPublished CVE record published
2026-06-16 22:30 UTCUpdated Record last modified

nivisec user viewed posts tracker DOWNGRADE

Affected: 1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0

1. Check installed version

apt-cache policy user-viewed-posts-tracker || rpm -q user-viewed-posts-tracker || user-viewed-posts-tracker --version

2. No fixed release: DOWNGRADE to a release before 1.0 (Debian / Ubuntu)

apt-cache madison user-viewed-posts-tracker sudo apt install user-viewed-posts-tracker=<VERSION_BEFORE_1.0> sudo apt-mark hold user-viewed-posts-tracker

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

dnf --showduplicates list user-viewed-posts-tracker sudo dnf downgrade user-viewed-posts-tracker-<VERSION_BEFORE_1.0> sudo dnf versionlock add user-viewed-posts-tracker

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: phpBB User Viewed Posts Tracker 1.0 - 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-2006-5223?

user viewed posts tracker: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2006-5223 being exploited?

CVE-2006-5223 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-2006-5223 affect?

CVE-2006-5223 affects user viewed posts tracker. Severity is high (CVSS 7.5). PHP remote file inclusion vulnerability in includes/functions_user_viewed_posts.php in the Nivisec User Viewed Posts Tracker module 1.0 and earlier for phpBB allows remote attackers to execute arbitrary PHP code via a URL in the phpbb_root_

How urgent is CVE-2006-5223?

Priority 54/100. High severity; EPSS top 9%: very likely to be exploited; Public exploit reference

Software pages

PHP vulnerabilities

References

← Back to latest CVEs