VULNERABILITY INTELLIGENCE
CVE-2009-4491
CVSS score9.8 CRITICAL
EPSS probability13.72%
CISA KEVNot currently listed
Published2010-01-13
Last modified2026-06-16
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Description
thttpd 2.25b0 writes data to a log file 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.
Weakness classification
- CWE-20: Improper Input Validation
- CWE-94: Improper Control of Generation of Code ('Code Injection')