{"id":"CVE-2013-5123","aliases":["GHSA-c5h8-cq4v-cvfm","PYSEC-2019-160"],"url":"https://o3.security/vulnerability/CVE-2013-5123","summary":"Improper Authentication in pip","details":"The mirroring support (-M, --use-mirrors) in Python Pip before 1.5 uses insecure DNS querying and authenticity checks which allows attackers to perform man-in-the-middle attacks.","published":"2019-11-05T22:15:10Z","modified":"2026-04-16T06:20:37.546021064Z","cvss":{"score":5.9,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N"},"epss":{"score":0.07987,"percentile":0.94405,"asOf":"2026-08-23"},"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"PyPI","name":"pip","fixedVersion":"1.5"}],"fix":null,"references":[{"type":"ADVISORY","url":"http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155248.html"},{"type":"ADVISORY","url":"http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155291.html"},{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2013/08/21/17"},{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2013/08/21/18"},{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/77520"},{"type":"ADVISORY","url":"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2013-5123"},{"type":"ADVISORY","url":"https://bugzilla.suse.com/show_bug.cgi?id=CVE-2013-5123"},{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2013-5123"},{"type":"ARTICLE","url":"http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155248.html"},{"type":"ARTICLE","url":"http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155291.html"},{"type":"ARTICLE","url":"http://www.openwall.com/lists/oss-security/2013/08/21/17"},{"type":"ARTICLE","url":"http://www.openwall.com/lists/oss-security/2013/08/21/18"},{"type":"FIX","url":"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2013-5123"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2013-5123"},{"type":"REPORT","url":"https://bugzilla.suse.com/show_bug.cgi?id=CVE-2013-5123"},{"type":"WEB","url":"http://www.securityfocus.com/bid/77520"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-04-16T06:20:37.546021064Z"}}