CVE-2009-4611: Mortbay Jetty

High severity, CVSS 7.5. EPSS: 3.2% chance of exploitation in the next 30 days.

Mort Bay Jetty 6.x through 6.1.22 and 7.0.0 writes backtrace data without sanitizing non-printable characters, which might allow remote attackers to modify a window's title, or possibly execute arbitrary commands or overwrite files, via an HTTP request containing an escape sequence for a terminal emulator, related to (1) a string value in the Age parameter to the default URI for the Cookie Dump Servlet in test-jetty-webapp/src/main/java/com/acme/CookieDump.java under cookie/, (2) an alphabetic value in the A parameter to jsp/expr.jsp, or (3) an alphabetic value in the Content-Length HTTP header to an arbitrary application.

Affected products

• Mortbay Jetty: version 6.0.0 only; version 6.0.1 only; version 6.0.2 only; version 6.1.0 only; version 6.1.1 only; version 6.1.2 only; …

Published 2010-01-13. Last modified 2026-06-16.