CVE-2006-0604: check.php in Hinton Design phphg Guestbook 1.2 does not check the user password when authenticating via cookie

This month

HIGH 7.5DOWNGRADE

CVE-2006-0604 is a high-severity flaw (CVSS 7.5) affecting phphg guestbook. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

check.php in Hinton Design phphg Guestbook 1.2 does not check the user password when authenticating via cookies, which allows remote attackers to gain unauthorized access.

Why this priority

High severity

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	2.7% (top 14%)
CISA exploited list	No
Published	2006-02-08
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: hinton design

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

Am I affected?

Timeline

2006-02-08 23:02 UTCPublished CVE record published
2026-06-16 22:20 UTCUpdated Record last modified

hinton design phphg guestbook DOWNGRADE

Affected: 1.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.2

1. Check installed version

apt-cache policy phphg-guestbook || rpm -q phphg-guestbook || phphg-guestbook --version

2. No fixed release: DOWNGRADE to a release before 1.2 (Debian / Ubuntu)

apt-cache madison phphg-guestbook sudo apt install phphg-guestbook=<VERSION_BEFORE_1.2> sudo apt-mark hold phphg-guestbook

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

dnf --showduplicates list phphg-guestbook sudo dnf downgrade phphg-guestbook-<VERSION_BEFORE_1.2> sudo dnf versionlock add phphg-guestbook

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-2006-0604?

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

Is CVE-2006-0604 being exploited?

CVE-2006-0604 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-2006-0604 affect?

CVE-2006-0604 affects phphg guestbook. Severity is high (CVSS 7.5). check.php in Hinton Design phphg Guestbook 1.2 does not check the user password when authenticating via cookies, which allows remote attackers to gain unauthorized access.

How urgent is CVE-2006-0604?

Priority 48/100. High severity

Software pages

PHP vulnerabilities

Related CVEs

CVE-2006-0603 MEDIUM 6.4 DOWNGRADE Multiple cross-site scripting vulnerabilities in signed.php in Hinton Design phphg Guestbook 1.2 allow remote
CVE-2006-0602 HIGH 7.5 DOWNGRADE Multiple SQL injection vulnerabilities in Hinton Design phphg Guestbook 1.2 allow remote attackers to execute

References

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