CVE-2003-0063: XFREE86 Project x11r6

High severity, CVSS 7.3. EPSS: 3.4% chance of exploitation in the next 30 days.

The xterm terminal emulator in XFree86 4.2.0 and earlier allows attackers to modify the window title via a certain character escape sequence and then insert it back to the command line in the user's terminal, e.g. when the user views a file containing the malicious sequence, which could allow the attacker to execute arbitrary commands.

Affected products

• XFREE86 Project x11r6: version 4.0 only; version 4.0.1 only; version 4.0.3 only; version 4.1.0 only; version 4.2.0 only; version 4.2.1 only

Published 2003-03-03. Last modified 2026-06-16.