Security Advisory - Curesec Research Team
1. Introduction
Affected phplist 3.2.6
Product:
Fixed in: 3.3.1
Fixed Version https://sourceforge.net/projects/phplist/files/phplist/3.3.1/
Link: phplist-3.3.1.zip/download
Vendor Website: https://www.phplist.org/
Vulnerability XSS
Type:
Remote Yes
Exploitable:
Reported to 01/10/2017
vendor:
Disclosed to 02/20/2017
public:
Release mode: Coordinated Release
CVE: n/a (not requested)
Credits Tim Coen of Curesec GmbH
2. Overview
phplist is an application to manage newsletters, written in PHP. In version
3.2.6, it is vulnerable to Cross Site Scripting.
The application contains one reflected XSS, and multiple persistent XSS
vulnerabilities. The persistent XSS vulnerabilities are only exploitable by
users with specific privileges.
3. Details
Reflected XSS
CVSS: Medium 6.1 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
The page parameter is vulnerable to reflected XSS.
Proof of Concept:
http://localhost/lists/admin/?page=send\'\">&id=187&tk
=c
Persistent XSS
CVSS: Medium 5.5 CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
Various components of the administration interface are vulnerable to persistent
XSS. While a user account is required to exploit these issues, they may be used
by less privileged users to escalate their privileges.
Persistent XSS: List Name
The name of a list is echoed in various locations without encoding, leading to
persistent XSS. An account with the privilege to create a list is required.
Add new List: http://localhost/lists/admin/?page=editlist&tk=c as name use :
list'">
To trigger the payload, visit - Add new
subscribers to list: http://localhost/lists/admin/?page=importsimple&list=84&tk
=c - Overview of all lists: http://localhost/lists/admin/?page=list&tk=c - List
members of list: http://localhost/lists/admin/?page=members&id=3&tk=c - View
member (loaded as part of the lists tab): http://localhost/lists/admin/?page=
user&id=4 - Creating a Campaign (in step 4): http://localhost/lists/admin/?page
=send&id=2&tk=c&tab=Lists
Persistent XSS: Subscribe Page
Various parameters of the subscribe page - such as the title - are vulnerable
to persistent XSS. An account with the privilege to edit the subscribe page is
required.
Add a new subscribe page: http://localhost/lists/admin/?page=spage as title
use: subscribe'"> To trigget the payload: - Visit
the subscribe page: http://localhost/lists/index.php?p=subscribe&id=1 - Visit
the subscribe page overview: http://localhost/lists/admin/?page=spage
Persistent XSS: Bounce Rule
The expression parameter of bounce rules is vulnerable to persistent XSS. An
account with the privilege to edit bounce rules is required.
Add a new bounce rule:http://localhost/lists/admin/?page=bouncerules&type=
active as regular expression use: test'"&ht;