wp-admin/upgrade.php in WordPress, probably 2.6.x, allows remote attackers to upgrade the application, and possibly cause a denial of service (application outage), via a direct request.
https://exchange.xforce.ibmcloud.com/vulnerabilities/50384
http://www.debian.org/security/2009/dsa-1871
Source: Mitre, NVD
Published: 2009-04-28
Updated: 2017-08-17
Base Score: 10
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C
Severity: Critical
Base Score: 7.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Severity: High