CVE-2003-1400: Cross-site scripting (XSS) vulnerability in the Your_Account module for PHP-Nuke 5.0 through 6.0 allows remote

Routine

MEDIUM 4.3DOWNGRADE

CVE-2003-1400 is a medium-severity flaw (CVSS 4.3) affecting php-nuke. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting (XSS) vulnerability in the Your_Account module for PHP-Nuke 5.0 through 6.0 allows remote attackers to inject arbitrary web script or HTML via the user_avatar parameter.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	1.5% (top 27%)
CISA exploited list	No
Weakness	CWE-79
Published	2003-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: francisco burzi

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

Am I affected?

Timeline

2003-12-31 05:00 UTCPublished CVE record published
2026-06-16 22:04 UTCUpdated Record last modified

francisco burzi php-nuke DOWNGRADE

Affected: 5.0 · 5.0.1 · 5.1 · 5.2 · 5.2a · 5.3.1 · 5.4 · 5.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.0

1. Check installed version

apt-cache policy php-nuke || rpm -q php-nuke || php-nuke --version

2. No fixed release: DOWNGRADE to a release before 5.0 (Debian / Ubuntu)

apt-cache madison php-nuke sudo apt install php-nuke=<VERSION_BEFORE_5.0> sudo apt-mark hold php-nuke

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

dnf --showduplicates list php-nuke sudo dnf downgrade php-nuke-<VERSION_BEFORE_5.0> sudo dnf versionlock add php-nuke

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: PHP-Nuke 5.x/6.0 - Avatar HTML Injection

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-2003-1400?

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

Is CVE-2003-1400 being exploited?

CVE-2003-1400 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-2003-1400 affect?

CVE-2003-1400 affects php-nuke. Severity is medium (CVSS 4.3). Cross-site scripting (XSS) vulnerability in the Your_Account module for PHP-Nuke 5.0 through 6.0 allows remote attackers to inject arbitrary web script or HTML via the user_avatar parameter.

How urgent is CVE-2003-1400?

Priority 38/100. Public exploit reference

Software pages

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References

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