CVE-2001-0991: Scott R. Lemmon Proxomitron Naoko-4

High severity, CVSS 7.5. EPSS: 7.1% chance of exploitation in the next 30 days.

Cross-site scripting vulnerability in Proxomitron Naoko-4 BetaFour and earlier allows remote attackers to execute arbitrary script on other clients via an incorrect URL containing the malicious script, which is printed back in an error message.

Affected products

• Scott R. Lemmon Proxomitron Naoko-4: version beta1 only; version beta2 only; version beta3 only; version beta4 only

Published 2001-07-24. Last modified 2026-06-16.