CVE-2005-1621: Directory traversal vulnerability in the pnModFunc function in pnMod.php for PostNuke 0.750 through 0.760rc4 a

Routine

MEDIUM 5.0DOWNGRADE

CVE-2005-1621 is a medium-severity flaw (CVSS 5.0) affecting postnuke. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Directory traversal vulnerability in the pnModFunc function in pnMod.php for PostNuke 0.750 through 0.760rc4 allows remote attackers to read arbitrary files via a .. (dot dot) in the func parameter to index.php.

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	1.7% (top 23%)
CISA exploited list	No
Published	2005-05-16
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: postnuke software foundation

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

Am I affected?

Timeline

2005-05-16 04:00 UTCPublished CVE record published
2026-06-16 22:13 UTCUpdated Record last modified

postnuke software foundation postnuke DOWNGRADE

Affected: 0.750 · 0.760_rc2 · 0.760_rc3 · 0.760_rc4

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.750

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.750 (Debian / Ubuntu)

apt-cache madison postnuke sudo apt install postnuke=<VERSION_BEFORE_0.750> sudo apt-mark hold postnuke

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

dnf --showduplicates list postnuke sudo dnf downgrade postnuke-<VERSION_BEFORE_0.750> sudo dnf versionlock add postnuke

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-2005-1621?

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

Is CVE-2005-1621 being exploited?

CVE-2005-1621 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-2005-1621 affect?

CVE-2005-1621 affects postnuke. Severity is medium (CVSS 5.0). Directory traversal vulnerability in the pnModFunc function in pnMod.php for PostNuke 0.750 through 0.760rc4 allows remote attackers to read arbitrary files via a .. (dot dot) in the func parameter to index.php.

How urgent is CVE-2005-1621?

Priority 37/100. No elevated risk signals yet.

Software pages

PHP vulnerabilities

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References

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