PHP-Nuke 5.1 stores user and administrator passwords in a base-64 encoded cookie, which could allow remote attackers to gain privileges by stealing or sniffing the cookie and decoding it.
https://exchange.xforce.ibmcloud.com/vulnerabilities/7596
http://www.securityfocus.com/bid/3567
http://marc.info/?l=bugtraq&m=100638850219503&w=2
Source: Mitre, NVD
Published: 2001-11-21
Updated: 2017-12-19
Base Score: 7.5
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P
Severity: High
Base Score: 9.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity: Critical