CVE-2003-1203: Cross-site scripting (XSS) vulnerability in index.php for Mambo Site Server 4.0.10 allows remote attackers to

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MEDIUM 4.3DOWNGRADE

CVE-2003-1203 is a medium-severity flaw (CVSS 4.3) affecting mambo site server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting (XSS) vulnerability in index.php for Mambo Site Server 4.0.10 allows remote attackers to execute script on other clients via the ?option 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	3.6% (top 11%)
CISA exploited list	No
Published	2003-03-18
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: mambo

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

Am I affected?

Timeline

2003-03-18 05:00 UTCPublished CVE record published
2026-06-16 22:03 UTCUpdated Record last modified

mambo mambo site server DOWNGRADE

Affected: 4.0.10

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.0.10

1. Check installed version

apt-cache policy mambo-site-server || rpm -q mambo-site-server || mambo-site-server --version

2. No fixed release: DOWNGRADE to a release before 4.0.10 (Debian / Ubuntu)

apt-cache madison mambo-site-server sudo apt install mambo-site-server=<VERSION_BEFORE_4.0.10> sudo apt-mark hold mambo-site-server

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

dnf --showduplicates list mambo-site-server sudo dnf downgrade mambo-site-server-<VERSION_BEFORE_4.0.10> sudo dnf versionlock add mambo-site-server

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: Mambo Site Server 4.0.10 - 'index.php' Cross-Site Scripting

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-2003-1203?

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

Is CVE-2003-1203 being exploited?

CVE-2003-1203 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-2003-1203 affect?

CVE-2003-1203 affects mambo site server. Severity is medium (CVSS 4.3). Cross-site scripting (XSS) vulnerability in index.php for Mambo Site Server 4.0.10 allows remote attackers to execute script on other clients via the ?option parameter.

How urgent is CVE-2003-1203?

Priority 42/100. Public exploit reference

Software pages

PHP vulnerabilities

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References

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