The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230).
Attack Complexity
Low
AC
The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required
None
PR
The attacker is unauthenticated prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
Scope
Unchanged
S
An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances.
Confidentiality
Low
C
There is some impact on confidentiality, but the attacker either does not gain control of any data, or the information obtained does not have a significant impact on the system or its operations.
Integrity
Low
I
Modification of data is possible, but the attacker does not have control over what can be modified, or the extent of what the attacker can affect is limited. The data modified does not have a direct, serious impact on the system.
Availability
None
A
There is no impact on the availability of the system; the attacker does not have the ability to disrupt access to or use of the system.
WordPress Easy Table 1.6 Cross Site Scripting=============================================
MGC ALERT 2017-001
- Original release date: Feb 07, 2017
- Last revised: Feb 12, 2017
- Discovered by: Manuel Garcia Cardenas
- Severity: 4,8/10 (CVSS Base Score)
=============================================
I. VULNERABILITY
-------------------------
WordPress Plugin Easy Table 1.6 - Persistent Cross-Site Scripting
II. BACKGROUND
-------------------------
Easy Table is a WordPress plugin that allow you to insert table in easy way.
III. DESCRIPTION
-------------------------
Has been detected a Persistent XSS vulnerability in Easy Table, that allows
the execution of arbitrary HTML/script code to be executed in the context
of the victim user's browser.
IV. PROOF OF CONCEPT
-------------------------
Malicious Request:
/wordpress/wp-admin/options-general.php?page=easy-table
easy_table_plugin_option[shortcodetag]
easy_table_plugin_option[attrtag]
easy_table_plugin_option[class]
easy_table_plugin_option[width]
easy_table_plugin_option[border]
easy_table_plugin_option[align]
easy_table_plugin_option[limit]
easy_table_plugin_option[nl]
easy_table_plugin_option[terminator]
easy_table_plugin_option[delimiter]
easy_table_plugin_option[escape]
In all of this parameters an attacker can inject for example
"><script>alert(1)</script> to perform a attack of Persistent Cross-Site
Scripting.
V. BUSINESS IMPACT
-------------------------
An attacker can execute arbitrary HTML or script code in a targeted user's
browser, this can leverage to steal sensitive information as user
credentials, personal data, etc.
VI. SYSTEMS AFFECTED
-------------------------
Easy Table <= 1.6
VII. SOLUTION
-------------------------
Disable the plugin until a fix is available.
VIII. REFERENCES
-------------------------
https://wordpress.org/plugins-wp/easy-table/
IX. CREDITS
-------------------------
This vulnerability has been discovered and reported
by Manuel Garcia Cardenas (advidsec (at) gmail (dot) com).
X. REVISION HISTORY
-------------------------
Feb 07, 2017 1: Initial release
Feb 12, 2017 2: Last revision
XI. DISCLOSURE TIMELINE
-------------------------
Feb 07, 2017 1: Vulnerability acquired by Manuel Garcia Cardenas
Feb 07, 2017 2: Send to vendor
Feb 09, 2017 3: New contact with vendor without response
Feb 12, 2017 4: Sent to lists
XII. LEGAL NOTICES
-------------------------
The information contained within this advisory is supplied "as-is" with no
warranties or guarantees of fitness of use or otherwise.
XIII. ABOUT
-------------------------
Manuel Garcia Cardenas
Pentester