VULNERABILITY INTELLIGENCE
CVE-2011-1521
CVSS score6.4 MEDIUM
EPSS probability3.56%
CISA KEVNot currently listed
Published2011-05-24
Last modified2026-06-16
CVSS vectorAV:N/AC:L/Au:N/C:P/I:N/A:P
Description
The urllib and urllib2 modules in Python 2.x before 2.7.2 and 3.x before 3.2.1 process Location headers that specify redirection to file: URLs, which makes it easier for remote attackers to obtain sensitive information or cause a denial of service (resource consumption) via a crafted URL, as demonstrated by the file:///etc/passwd and file:///dev/zero URLs.