CVE-2007-0809: PHP remote file inclusion vulnerability in includes/class_template.php in Categories hierarchy (aka CH or mod-

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HIGH 7.5DOWNGRADE

CVE-2007-0809 is a high-severity flaw (CVSS 7.5) affecting mod-ch. 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/class_template.php in Categories hierarchy (aka CH or mod-CH) 2.1.2 in ptirhiikmods allows remote attackers to execute arbitrary PHP code via a URL in the phpbb_root_path parameter.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	3.3% (top 11%)
CISA exploited list	No
Published	2007-02-07
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: ptirhiikmods

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

Am I affected?

Timeline

2007-02-07 11:28 UTCPublished CVE record published
2026-06-16 22:36 UTCUpdated Record last modified

ptirhiikmods mod-ch DOWNGRADE

Affected: 2.1.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.1.2

1. Check installed version

apt-cache policy mod-ch || rpm -q mod-ch || mod-ch --version

2. No fixed release: DOWNGRADE to a release before 2.1.2 (Debian / Ubuntu)

apt-cache madison mod-ch sudo apt install mod-ch=<VERSION_BEFORE_2.1.2> sudo apt-mark hold mod-ch

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

dnf --showduplicates list mod-ch sudo dnf downgrade mod-ch-<VERSION_BEFORE_2.1.2> sudo dnf versionlock add mod-ch

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: Categories hierarchy phpBB Mod 2.1.2 - '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-2007-0809?

mod-ch: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2007-0809 being exploited?

CVE-2007-0809 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-2007-0809 affect?

CVE-2007-0809 affects mod-ch. Severity is high (CVSS 7.5). PHP remote file inclusion vulnerability in includes/class_template.php in Categories hierarchy (aka CH or mod-CH) 2.1.2 in ptirhiikmods allows remote attackers to execute arbitrary PHP code via a URL in the phpbb_root_path parameter.

How urgent is CVE-2007-0809?

Priority 53/100. High severity; Public exploit reference

Software pages

PHP vulnerabilities

References

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