CVE-2006-5094: PHP remote file inclusion vulnerability in includes/functions_kb.php in the phpBB XS 2 (Spain version) allows

This month

MEDIUM 5.1DOWNGRADE

CVE-2006-5094 is a medium-severity flaw (CVSS 5.1) affecting phpbb xs. 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_kb.php in the phpBB XS 2 (Spain version) allows remote attackers to execute arbitrary PHP code via a URL in the phpbb_root_path parameter, a different vector than CVE-2006-4780 or CVE-2006-4893.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	5.1 (Medium)
EPSS exploit chance	3.2% (top 12%)
CISA exploited list	No
Published	2006-09-29
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: phpbb xs

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

Am I affected?

Timeline

2006-09-29 21:07 UTCPublished CVE record published
2026-06-16 22:30 UTCUpdated Record last modified

phpbb xs phpbb xs DOWNGRADE

Affected: 2

Fixed in: no fixed release known

Safe to downgrade to: a release before 2

1. Check installed version

apt-cache policy phpbb-xs || rpm -q phpbb-xs || phpbb-xs --version

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

apt-cache madison phpbb-xs sudo apt install phpbb-xs=<VERSION_BEFORE_2> sudo apt-mark hold phpbb-xs

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

dnf --showduplicates list phpbb-xs sudo dnf downgrade phpbb-xs-<VERSION_BEFORE_2> sudo dnf versionlock add phpbb-xs

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 XS 0.58a - 'phpbb_root_path' 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-2006-5094?

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

Is CVE-2006-5094 being exploited?

CVE-2006-5094 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-2006-5094 affect?

CVE-2006-5094 affects phpbb xs. Severity is medium (CVSS 5.1). PHP remote file inclusion vulnerability in includes/functions_kb.php in the phpBB XS 2 (Spain version) allows remote attackers to execute arbitrary PHP code via a URL in the phpbb_root_path parameter, a different vector than CVE-2006-4780 o

How urgent is CVE-2006-5094?

Priority 45/100. Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2007-5033 MEDIUM 4.3 DOWNGRADE Cross-site scripting (XSS) vulnerability in profile.php in phpBB XS 2 allows remote attackers to inject arbitr
CVE-2006-4893 HIGH 7.5 UPGRADE PHP remote file inclusion vulnerability in bb_usage_stats/includes/bb_usage_stats.php in phpBB XS 0.58 and ear
CVE-2006-4780 HIGH 7.5 UPGRADE PHP remote file inclusion vulnerability in includes/functions.php in phpBB XS 0.58 and earlier allows remote a

References

← Back to latest CVEs