CVE-2001-1513: Macromedia Jrun

High severity, CVSS 7.5. EPSS: 1.5% chance of exploitation in the next 30 days.

Macromedia JRun 3.0 and 3.1 allows remote attackers to obtain duplicate active user session IDs and perform actions as other users via a URL request for the web application directory without the trailing '/' (slash), as demonstrated using ctx.

Affected products

• Macromedia Jrun: version 3.0 only; version 3.1 only

Published 2001-12-31. Last modified 2026-06-16.