CVE-2009-3424: Multiple PHP remote file inclusion vulnerabilities in MaxCMS 3.11.20b, when register_globals is enabled, allow

This month

MEDIUM 6.8DOWNGRADE

CVE-2009-3424 is a medium-severity flaw (CVSS 6.8) affecting maxcms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple PHP remote file inclusion vulnerabilities in MaxCMS 3.11.20b, when register_globals is enabled, allow remote attackers to execute arbitrary PHP code via a URL in the (1) is_projectPath parameter to includes/InstantSite/inc.is_root.php; GLOBALS[thCMS_root] parameter to (2) classes/class.Tree.php, (3) includes/inc.thcms_admin_mediamanager.php, and (4) modul/mod.rssreader.php; is_path parameter to (5) class.tasklist.php, (6) class.thcms.php

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.8 (Medium)
EPSS exploit chance	1.9% (top 20%)
CISA exploited list	No
Weakness	CWE-94
Published	2009-09-25
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: databay

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

Am I affected?

Timeline

2009-09-25 22:30 UTCPublished CVE record published
2026-06-16 23:11 UTCUpdated Record last modified

databay maxcms DOWNGRADE

Affected: 3.11.20b

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.11.20b

1. Check installed version

apt-cache policy maxcms || rpm -q maxcms || maxcms --version

2. No fixed release: DOWNGRADE to a release before 3.11.20b (Debian / Ubuntu)

apt-cache madison maxcms sudo apt install maxcms=<VERSION_BEFORE_3.11.20b> sudo apt-mark hold maxcms

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

dnf --showduplicates list maxcms sudo dnf downgrade maxcms-<VERSION_BEFORE_3.11.20b> sudo dnf versionlock add maxcms

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: MAXcms 3.11.20b - Multiple Remote File Inclusions

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-2009-3424?

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

Is CVE-2009-3424 being exploited?

CVE-2009-3424 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-2009-3424 affect?

CVE-2009-3424 affects maxcms. Severity is medium (CVSS 6.8). Multiple PHP remote file inclusion vulnerabilities in MaxCMS 3.11.20b, when register_globals is enabled, allow remote attackers to execute arbitrary PHP code via a URL in the (1) is_projectPath parameter to includes/InstantSite/inc.is_root.

How urgent is CVE-2009-3424?

Priority 49/100. Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2009-3426 MEDIUM 6.8 DOWNGRADE PHP remote file inclusion vulnerability in includes/file_manager/special.php in MaxCMS 3.11.20b allows remote
CVE-2009-3425 MEDIUM 5.0 DOWNGRADE Directory traversal vulnerability in includes/inc.thcms_admin_dirtree.php in MaxCMS 3.11.20b allows remote att
CVE-2009-1818 HIGH 7.5 DOWNGRADE SQL injection vulnerability in admin/admin_manager.asp in MaxCMS 2.0 allows remote attackers to execute arbitr
CVE-2009-1764 HIGH 7.5 DOWNGRADE SQL injection vulnerability in inc/ajax.asp in MaxCMS 2.0 allows remote attackers to execute arbitrary SQL com

References

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