Portable UPnP SDK (aka libupnp) before 1.6.21 allows remote attackers to write to arbitrary files in the webroot via a POST request without a registered handler.
http://www.debian.org/security/2016/dsa-3736
http://www.openwall.com/lists/oss-security/2016/07/18/13
http://www.openwall.com/lists/oss-security/2016/07/20/5
http://www.securityfocus.com/bid/92050
https://github.com/mjg59/pupnp-code/commit/be0a01bdb83395d9f3a5ea09c1308a4f1a972cbd
https://security.gentoo.org/glsa/201701-52
https://sourceforge.net/p/pupnp/code/ci/master/tree/ChangeLog
https://twitter.com/mjg59/status/755062278513319936
Source: MITRE
Published: 2017-03-07
Updated: 2017-11-03
Type: CWE-284
Base Score: 5
Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N
Impact Score: 2.9
Exploitability Score: 10
Severity: MEDIUM
Base Score: 7.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Impact Score: 3.6
Exploitability Score: 3.9
Severity: HIGH