CVE-2003-0063

What it is

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.

At a glance

Exploitability

Can be exploited over the network without logging in. Limited direct impact.

Exploit odds

3.4% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2003-03-03 05:00 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-16 22:01 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 3.4% in the next 30 days (EPSS).
• Severity: 7.3 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2003-03-03 05:00 UTC

Last modified

2026-06-16 22:01 UTC

Exploit probability

3.4% · EPSS, next 30 days

Record status

Modified

Affected

• xfree86 Project x11r6 4.0
• xfree86 Project x11r6 4.0.1
• xfree86 Project x11r6 4.0.3
• xfree86 Project x11r6 4.1.0
• xfree86 Project x11r6 4.2.0
• xfree86 Project x11r6 4.2.1

Attack profile CVSS 3.1 · 7.3

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2003-0063.md and follow it. Check whether this project is affected by CVE-2003-0063. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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