CVE-2006-4503: Directory traversal vulnerability in link.php in NX5Linx 1.0 allows remote attackers to read arbitrary files v

Routine

MEDIUM 5.0DOWNGRADE

CVE-2006-4503 is a medium-severity flaw (CVSS 5.0) affecting nx5linx. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Directory traversal vulnerability in link.php in NX5Linx 1.0 allows remote attackers to read arbitrary files via the logo parameter.

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	1.8% (top 21%)
CISA exploited list	No
Published	2006-08-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: nx5

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

Am I affected?

Timeline

2006-08-31 22:04 UTCPublished CVE record published
2026-06-16 22:29 UTCUpdated Record last modified

nx5 nx5linx DOWNGRADE

Affected: 1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0

1. Check installed version

apt-cache policy nx5linx || rpm -q nx5linx || nx5linx --version

2. No fixed release: DOWNGRADE to a release before 1.0 (Debian / Ubuntu)

apt-cache madison nx5linx sudo apt install nx5linx=<VERSION_BEFORE_1.0> sudo apt-mark hold nx5linx

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

dnf --showduplicates list nx5linx sudo dnf downgrade nx5linx-<VERSION_BEFORE_1.0> sudo dnf versionlock add nx5linx

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-2006-4503?

nx5linx: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2006-4503 being exploited?

CVE-2006-4503 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-2006-4503 affect?

CVE-2006-4503 affects nx5linx. Severity is medium (CVSS 5.0). Directory traversal vulnerability in link.php in NX5Linx 1.0 allows remote attackers to read arbitrary files via the logo parameter.

How urgent is CVE-2006-4503?

Priority 37/100. No elevated risk signals yet.

Software pages

PHP vulnerabilities

Related CVEs

CVE-2006-4505 HIGH 7.5 DOWNGRADE CRLF injection vulnerability in links.php in NX5Linx 1.0 allows remote attackers to inject arbitrary HTTP head
CVE-2006-4504 HIGH 7.5 DOWNGRADE SQL injection vulnerability in NX5Linx 1.0 allows remote attackers to execute arbitrary SQL commands via the (

References

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