CVE-2006-5421: WSN Forum 1.3.4 and earlier allows remote attackers to execute arbitrary PHP code via a modified pathname in t

Q: How do I fix CVE-2006-5421?

wsn forum: upgrade to newer than 1.3.4. Exact commands for each OS are on this page.

Q: Is CVE-2006-5421 being exploited?

CVE-2006-5421 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2006-5421 affect?

CVE-2006-5421 affects wsn forum. Severity is high (CVSS 7.5). WSN Forum 1.3.4 and earlier allows remote attackers to execute arbitrary PHP code via a modified pathname in the pathtoconfig parameter that points to an avatar image that contains PHP code, which is then accessed from prestart.php. NOTE:

Q: How urgent is CVE-2006-5421?

Priority 53/100. High severity; Public exploit reference

This month

HIGH 7.5UPGRADE

CVE-2006-5421 is a high-severity flaw (CVSS 7.5) affecting wsn forum. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

WSN Forum 1.3.4 and earlier allows remote attackers to execute arbitrary PHP code via a modified pathname in the pathtoconfig parameter that points to an avatar image that contains PHP code, which is then accessed from prestart.php. NOTE: this issue has been labeled remote file inclusion, but that label only applies to the attack, not the underlying vulnerability.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	2.9% (top 13%)
CISA exploited list	No
Published	2006-10-20
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: wsn forum

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

Am I affected?

Timeline

2006-10-20 14:07 UTCPublished CVE record published
2026-06-16 22:31 UTCUpdated Record last modified

wsn forum wsn forum UPGRADE

Affected: <= 1.3.4

Fixed in: newer than 1.3.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy wsn-forum || rpm -q wsn-forum || wsn-forum --version

2. UPGRADE to newer than 1.3.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade wsn-forum

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade wsn-forum

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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: WSN Forum 1.3.4 - 'prestart.php' Remote Code Execution

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-2006-5421?

wsn forum: upgrade to newer than 1.3.4. Exact commands for each OS are on this page.

Is CVE-2006-5421 being exploited?

CVE-2006-5421 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-2006-5421 affect?

CVE-2006-5421 affects wsn forum. Severity is high (CVSS 7.5). WSN Forum 1.3.4 and earlier allows remote attackers to execute arbitrary PHP code via a modified pathname in the pathtoconfig parameter that points to an avatar image that contains PHP code, which is then accessed from prestart.php. NOTE:

How urgent is CVE-2006-5421?

Priority 53/100. High severity; Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2005-3916 HIGH 7.5 DOWNGRADE SQL injection vulnerability in memberlist.php in WSN Forum 1.21 allows remote attackers to execute arbitrary S

References

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