CVE-2006-3206: register.php in Ultimate PHP Board (UPB) 1.9.6 and earlier allows remote attackers to create arbitrary account

Routine

MEDIUM 5.0DOWNGRADE

CVE-2006-3206 is a medium-severity flaw (CVSS 5.0) affecting ultimate php board. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

register.php in Ultimate PHP Board (UPB) 1.9.6 and earlier allows remote attackers to create arbitrary accounts via the "[NR]" sequence in the signature field, which is used to separate multiple records.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	1.0% (top 36%)
CISA exploited list	No
Published	2006-06-24
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: ultimate php board

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

Am I affected?

Timeline

2006-06-24 01:06 UTCPublished CVE record published
2026-06-16 22:26 UTCUpdated Record last modified

ultimate php board ultimate php board DOWNGRADE

Affected: 1.8 · 1.8.2 · 1.9 · 1.9.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.8

1. Check installed version

apt-cache policy ultimate-php-board || rpm -q ultimate-php-board || ultimate-php-board --version

2. No fixed release: DOWNGRADE to a release before 1.8 (Debian / Ubuntu)

apt-cache madison ultimate-php-board sudo apt install ultimate-php-board=<VERSION_BEFORE_1.8> sudo apt-mark hold ultimate-php-board

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

dnf --showduplicates list ultimate-php-board sudo dnf downgrade ultimate-php-board-<VERSION_BEFORE_1.8> sudo dnf versionlock add ultimate-php-board

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.

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-2006-3206?

ultimate php board: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2006-3206 being exploited?

CVE-2006-3206 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-2006-3206 affect?

CVE-2006-3206 affects ultimate php board. Severity is medium (CVSS 5.0). register.php in Ultimate PHP Board (UPB) 1.9.6 and earlier allows remote attackers to create arbitrary accounts via the "[NR]" sequence in the signature field, which is used to separate multiple records.

How urgent is CVE-2006-3206?

Priority 34/100. No elevated risk signals yet.

Software pages

PHP vulnerabilities

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References

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