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Fencer Vulns
high 7.3

CVE-2003-0063 json

The xterm terminal emulator in XFree86 4.2.0 and earlier allows attackers to modify the window title via a certain character escape sequenc…

published 2003-03-03 23 y ago modified 2026-06-16 4 mo ago also EUVD-2003-0059

cvss
7.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
3.4%
EPSS 3.4% chance of exploitation in 30 days, percentile 89%
public exploits
0
none known

Summary

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.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2003-0063 updated

security flaw

  • Red Hat Enterprise Linux ES version 2.1 Red Hat Enterprise Linux WS version 2.1
    fixed: vendor fix RHSA-2003:065
  • Red Hat Linux 7.1 Red Hat Linux 7.2
    fixed: vendor fix RHSA-2003:064
  • Red Hat Linux 7.3
    fixed: vendor fix RHSA-2003:066
  • Red Hat Linux 8.0
    fixed: vendor fix RHSA-2003:067
  • Red Hat Linux Advanced Workstation 2.1
    fixed: vendor fix RHSA-2003:065

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
2 y ago

Exploit prediction

3.43% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CNA 3.1 7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • xfree86 xfree86

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.