CVE-2003-0523: Cross-site scripting (XSS) vulnerability in msg.asp for certain versions of ProductCart allow remote attackers

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MEDIUM 6.8DOWNGRADE

CVE-2003-0523 is a medium-severity flaw (CVSS 6.8) affecting productcart. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting (XSS) vulnerability in msg.asp for certain versions of ProductCart allow remote attackers to execute arbitrary web script via the message parameter.

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	3.3% (top 11%)
CISA exploited list	No
Published	2003-08-18
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: early impact

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

Am I affected?

Timeline

2003-08-18 04:00 UTCPublished CVE record published
2026-06-16 22:02 UTCUpdated Record last modified

early impact productcart DOWNGRADE

Affected: 1.5 · 1.6b · 1.6b001 · 1.6b002 · 1.6b003 · 1.6br · 1.6br001 · 1.6br003

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.5

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.5 (Debian / Ubuntu)

apt-cache madison productcart sudo apt install productcart=<VERSION_BEFORE_1.5> sudo apt-mark hold productcart

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

dnf --showduplicates list productcart sudo dnf downgrade productcart-<VERSION_BEFORE_1.5> sudo dnf versionlock add productcart

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: ProductCart 1.5/1.6/2.0 - 'MSG.asp' 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-2003-0523?

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

Is CVE-2003-0523 being exploited?

CVE-2003-0523 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-2003-0523 affect?

CVE-2003-0523 affects productcart. Severity is medium (CVSS 6.8). Cross-site scripting (XSS) vulnerability in msg.asp for certain versions of ProductCart allow remote attackers to execute arbitrary web script via the message parameter.

How urgent is CVE-2003-0523?

Priority 51/100. Public exploit reference

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References

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